Urinary System

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Urinary System Models Capsule Renal Cortex Renal Column Collecng Renal Pyramid Duct Renal Medulla Papilla of the pyramid Minor calyces Renal Pelvis Major calyx Interlobular Vein Interlobular Artery Arcurate Vein Arcurate artery Segmental Arteries Renal Renal Vein Artery Glomerular/Bowman’s Capsule Distal Afferent Convoluted glomerular tubule arteriole Parietal Layer Fenestrae Capillary Beginning Visceral of the Layer proximal convoluted Efferent tubule Podocytes glomerular arteriole Glomerulus PCT DCT PCT BC CD • Proximal Convoluted Tubule (PCT) BC • Distal Convulted Tubule (DCT) • Descending Loop of DLoH ALoH DLoH Henle (DLoH) • Ascending Loop of Henle (ALoH) • Collecng Duct (CD) • Bowman’s Capsule (BC) Adrenal Gland Renal Artery Kidney Renal Pelvis Inferior Vena Cava Abdominal Aorta Ureter Bladder Vas Deferens Seminal vesicle Prostate Adrenal Gland Renal Artery • Inside of the kidney has the Kidney same regions Renal Vein and structures as the first figure Ureter Bladder • 34‐ mucous lining of the bladder • 35‐ Trigone of the bladder • 36‐ Opening of the ureter • 37‐ Opening of the Urethra • 38‐ Urethra • 39‐ Prostate Urinary System‐ Slides Kidney Kidney Renal Cortex Cortex Renal Medullary ray Renal Medulla Medulla Renal Renal corpuscle Renal corpusle Glomerular capsule Renal Corpuscle Urinary space Glomerulus Ureter Ureter cross secon Lamina propria Smooth Muscle Transional epithelium Lumen of the ureter Bladder Wall of the urinary Bladder Transional epithelium Lamina propria muscle muscle Detrussor Detrussor Adventitia Adventitia Close‐up of the bladder wall Transional epithelium Lamina propria Basement membrane .

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Urinary System
URINARY SYSTEM Ján Líška DVM, PhD Institut of Histology and Embryology, Faculty of Medicine, Comenius University Urinary system • The kidneys are the organ with multiple functions: • filtration of the blood • excretion of metabolic waste products and related removal of toxins • maintenance blood volume • regulation of acid-base balance • regulation of fluid and electrolyte balance • production of the hormones The other components of urinary system are accessory. Their function is essentially in order to eliminate urine. Urinary system - anatomy • Kidney are located in the retroperitoneal space • The surface of the kidney is covered by a fibrous capsule of dense connective tissue. • This capsule is coated with adipose capsule. • Each kidney is attached to a ureter, which carries urine to the bladder and urine is discharged out through the urethra. ANATOMIC STRUCTURE OF THE KIDNEY RENAL LOBES CORTEX outer shell columns Excretory portion medullary rays MEDULLA medullary pyramids HILUM Collecting system blood vessels lymph vessels major calyces nerves RENAL PELVIS minor calyces ureter Cortex is the outer layer surrounding the internal medulla. The cortex contains renal corpuscles, convoluted parts of prox. and dist. tubules. Renal column: the renal tissue projection between two medullary pyramids which supports the cortex. Renal pyramids: the conical segments within the medulla. They contain the ductal apparatus and stright parts of the tubules. They posses papilla - having openings through which urine passes into the calyces. Each pyramid together with the associated overlying cortex forms a renal lobe. renal pyramid papilla minor calix minor calyx Medullary rays: are in the middle of cortical part of the renal lobe, consisting of a group of the straight portiones of nephrons and the collec- medullary rays ting tubules (only straight tubules).
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Lab-Renal-2018-Zw4m.Pdf
Introduction The slides for this lab are located in the “Urinary System” folders on the Virtual Microscope. In this lab, you will learn about the structures within the kidney required to filter the blood and the tubes required to transport the resulting waste products outside the body. The journey begins in the unit of the kidney called the nephron. Here the blood is filtered, products are reabsorbed and then some are secreted again, based on the body’s current state. Dissolved in water, these products then travel through the conducting portion of the kidney to the ureters. The ureters insert on the urinary bladder obliquely and posteriorly. The urinary bladder temporarily stores urine until it can be conveniently evacuated. Urine exits the body through the urethra. Learning objectives and activities Using the Virtual Slidebox: A Outline a renal lobe and identify the structural components of a renal lobule B Examine the components of the renal corpuscle: glomerulus and Bowman’s capsule C Classify the different areas of the renal tubules based upon their histological appearance and location D Compare the structures of the excretory passageways and use this information to identify them E Complete the self-quiz to test your understanding and master your learning Outline a renal lobe and identify the structural components of a renal lobule Examine Slide 1 and approximate a renal lobe in the kidney by identifying the following: Each kidney can be divided into somewhere between 8-15 renal lobes. Each lobe consists of a medullary pyramid capped by the cortex and flanked by renal columns with a renal papilla at its apex.
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Ward's Renal Lobule Model
Ward’s Renal Lobule Model 470029-444 1. Arcuate artery and vein. 7. Descending thick limb of 12. Collecting tubule. 2. Interlobular artery and vein. Henle's loop. 13. Papillary duct of Bellini. 3. Afferent glomerular arteriole. 8. Thin segment of Henle's 14. Vasa recta. loop. 4. Efferent glomerular arteriole. 15. Capillary bed of cortex (extends 9. Ascending thick limb of through entire cortex). 5. Renal corpuscle (glomerulus Henle's loop. plus Bowman's capsule). 10. Distal convoluted tubule. 16. Capillary bed of medulla (extends 6. Proximal convoluted tubule. 11. Arched connecting tubule. through entire medulla). MANY more banks of glomeruli occur in the cortex than are represented on the model, and the proportionate length of the medullary elements has been greatly reduced. The fundamental physiological unit of the kidney is the nephron, consisting of the glomerulus, Bowman's capsule, the proximal convoluted tubule, Henle's loop, and the distal convoluted tubule. The blood is filtered in the glomerulus, water and soluble substances, except blood proteins, passing into Bowman's capsule in the same proportions as they occur in the blood. In the proximal tubule water and certain useful substances are resorbed from the provisional urine, while some further components may be added to it by secretory activity on the part of the tubular epithelium. In the remainder of the tubule, resorption of certain substances is continued, while the urine is concentrated further by withdrawal of water. The finished urine flows through the collecting tubules without further change. Various kinds of loops occur, varying in length of the thin segment, and in the level to which they descend into the medulla.
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Urinary System
OUTLINE 27.1 General Structure and Functions of the Urinary System 818 27.2 Kidneys 820 27 27.2a Gross and Sectional Anatomy of the Kidney 820 27.2b Blood Supply to the Kidney 821 27.2c Nephrons 824 27.2d How Tubular Fluid Becomes Urine 828 27.2e Juxtaglomerular Apparatus 828 Urinary 27.2f Innervation of the Kidney 828 27.3 Urinary Tract 829 27.3a Ureters 829 27.3b Urinary Bladder 830 System 27.3c Urethra 833 27.4 Aging and the Urinary System 834 27.5 Development of the Urinary System 835 27.5a Kidney and Ureter Development 835 27.5b Urinary Bladder and Urethra Development 835 MODULE 13: URINARY SYSTEM mck78097_ch27_817-841.indd 817 2/25/11 2:24 PM 818 Chapter Twenty-Seven Urinary System n the course of carrying out their specific functions, the cells Besides removing waste products from the bloodstream, the uri- I of all body systems produce waste products, and these waste nary system performs many other functions, including the following: products end up in the bloodstream. In this case, the bloodstream is ■ Storage of urine. Urine is produced continuously, but analogous to a river that supplies drinking water to a nearby town. it would be quite inconvenient if we were constantly The river water may become polluted with sediment, animal waste, excreting urine. The urinary bladder is an expandable, and motorboat fuel—but the town has a water treatment plant that muscular sac that can store as much as 1 liter of urine. removes these waste products and makes the water safe to drink.
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8.5 X12.5 Doublelines.P65
Cambridge University Press 978-0-521-87702-2 - Silva’s Diagnostic Renal Pathology Edited by Xin J. Zhou, Zoltan Laszik, Tibor Nadasdy, Vivette D. D’Agati and Fred G. Silva Excerpt More information CHAPTER 1 CHAPTER Chapter 1 Renal Anatomy William L. Clapp, MD GROSS ANATOMY Glomerulus Location, Size, and Shape General Features Blood Supply Endothelial Cells Mesangium Form of Kidney (Mesangial Cells) NEPHRONS (Mesangial Matrix) Nephron Number GBM Nephron Types Podocytes Glomerular Filtration Barrier ARCHITECTURE Parietal Podocytes Cortex Parietal Epithelial Cells Cortical Labyrinth and Medullary Rays Peripolar Cells Renal Lobule JGA Medulla Tubules Outer Medulla Proximal Tubule Inner Medulla Thin Limbs of Henle’s Loop Algorithm for Architecture Distal Tubule PARENCHYMA (TAL) Vasculature (DCT) Connecting Tubule Macrovasculature Collecting Duct Microvasculature (Cortical Collecting Duct) (Cortex) (OMCD) (Medulla) (IMCD) Lymphatics Interstitium Nerves Knowledge of the elaborate structure of the kidney provides GROSS ANATOMY insight into its functions and facilitates an understanding of renal diseases. One cannot recognize what is abnormal in the Location, Size, and Shape kidney if one does not know what is normal. The following The retroperitoneum is divided into fascia-enclosed compart- sections consider the macroanatomy, functional units, architec- ments, including the anterior pararenal, perirenal, and posterior tural organization, microanatomy, and basic functions of the pararenal spaces. The kidneys lie within the perirenal space, which kidney. Unless otherwise stated, the illustrations will emphasize contains abundant fat and is enclosed by the anterior and posterior the human kidney. For additional information, readers are layers of renal fascia, known as Gerota’s fascia.The kidneys extend referred to several detailed reviews [1–4].
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General Functions of the Kidney
General Functions of the Kidney Major Functions of the Kidney 1. Regulation of: body fluid osmolality and volume electrolyte balance acid-base balance blood pressure 2. Excretion of: metabolic products (urea, creatinine, uric acid) foreign substances (pesticides, chemicals, toxins etc.) excess substance (water, etc) 3. Biosynthesis of: Erythropoietin 1,25-dihydroxy vitamin D3 (vitamin D activation) Renin Prostaglandin Glucose (gluconeogenesis) Angiotensinogen Ammonia Renal effects on other systems Vasoconstriction Renin Angiotensin II Sodium Aldosterone EPO reabsorption Gut Vitamin Bone D Calcium, Calcium phosphate absorption reabsorption Phosphate absorption Bone Ca release Red blood cells marrow PO4 release KIDNEY STRUCTURE Urinary system consists of: Kidneys – The functional unit of the system Ureters Urinary Conducting & Bladder Storage components Urethra Divided into an outer cortex And an inner medulla renal The functional unit of this pelvis kidney is the nephron which is located in both the cortex and medullary areas Macroscopic Structure of the Kidney Internally, the human kidney is composed of three distinct regions: the renal cortex, medulla, and pelvis. Cortical nephron Renal cortex Renal pyramid Renal pelvis Renal column Renal sinus Renal medulla Ureter Juxtamedullary nephron Nephrons in the cortex are cortical nephrons; those in both the cortex and the medulla are juxtamedullary nephrons. Microscopic structure The basic unit of the kidney is the nephron Nephron consists of the: * Glomerulus * Proximal convoluted tubule *
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Functions of Kidney & Artificial Kidneys
ISSN 2321 – 2004 INTERNATIONAL JOURNAL OF INNOVATIVE RESEARCH IN ELECTRICAL, ELECTRONICS, INSTRUMENTATION AND CONTROL ENGINEERING Vol. 1, Issue 1, April 2013 Functions of kidney & artificial kidneys Raghavendra1, Mallikarjun2, Vidya M.J3 Student, Instrumentation Technology, R.V.C.E, Bangalore, India 1 Student, Instrumentation Technology, R.V.C.E, Bangalore, India 2 Assistant Professor, Instrumentation Technology, R.V.C.E, Bangalore, India 3 Abstract: Renal failure is a term to describe a situation when the kidneys fail to work. This may be a permanent or temporary failure. When the kidneys fail, Wastes begin to accumulate in the blood (uremia) As homeostasis is upset within the body, other organs can also begin to shut down – heart, liver, etc. The end result of renal failure is usually death unless the blood is filtered by some other means. The ideal intervention is to replace the failed kidneys with a donor kidney (STSE).While a person waits for a donor kidney, they usually have to undergo dialysis, a method where their blood is filtered and cleaned on a regular basis using machines. Keywords: uraemia, homeostasis, Palpation, Elasticity I. INTRODUCTION The kidneys are organs that serve several essential of kidney stones is a sharp pain in the medial/lateral regulatory roles in most animals, including vertebrates and segments of the lower back. some invertebrates. They are essential in the urinary system and also serve homeostatic functions such as the II. ANATOMY regulation of electrolytes, maintenance of acid–base A. Location balance, and regulation of blood pressure (via maintaining salt and water balance). They serve the body as a natural In humans the kidneys are located in the abdominal cavity, filter of the blood, and remove wastes which are diverted more specifically in the paravertebral gutter and lie in a to the urinary bladder.
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URINARY Objectives
URINARY Objectives Students should be able to: 1. Describe the microscopic structure of the kidney cortex, medulla and renal pelvis; also the ureter and bladder. 2. Identify the histological features of the kidney, ureter and bladder. Kidney H & E stain General Histological Structure Low power magnification. Note the major features of a cross section through the kidney. Identify : renal capsule, cortex (deep staining zone), medulla and renal corpuscles. : renal corpuscles medulla cortex renal capsule 1.0mm Kidney Alkaline phosphatase stain General Histological Structure Identify : cortex , renal corpuscles, convoluted tubules and medullary rays. What does the term medullary rays imply? In the cortex- groups of radially arranged straight tubules form the cortical or medullary rays (pars radiata) section from cortex convoluted tubules renal corpuscle medullary ray 250 µm Kidney Detailed Histology Examine the structure of a renal corpuscle and appreciate how the filtration unit has been constructed. What constitutes the filter here? 1. Porous endothelium of capillaries. 2. Glomerular basement membrane. 3. Podocyte pedicels. U : urinary space Pd : podocyte Pd Pl : parietal layer U Pl proximal tubule 50 µm Kidney Detailed Histology Where does the filtrate collect? In the urinary space. What further changes take place in its composition before it is fully excreted? Extensive re-absorption (66-75%) of this glomerular filtrate in the proximal tubules. U : urinary space U 50 µm Kidney Detailed Histology What is the difference between vascular and urinary poles of the renal corpuscle? Why are they given these names? Vascular pole- with afferent and efferent arteriole blood supply. Urinary pole- with the start of the proximal convoluted tubule.
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Urinary System Organs Kidney Functions Kidney Functions
2/29/2016 Figure 26.4 Major sources of water intake and output. Learning Objectives Renal System 100 ml Feces 4% • Blood filtration through the glomerulus Metabolism 10% 250 ml Sweat 8% 200 ml Insensible loss • How Glomerular filtration rate is regulated Foods 30% 750 ml 700 ml via skin and – Intrinsic and extrinsic mechanisms lungs 28% • Formation of urine 2500 ml • Control of urine concentration Urine 60% Beverages 60% 1500 ml 1500 ml Average intake Average output © 2013 Pearson Education, Inc.per day per day Urinary System Organs Hepatic veins (cut) Esophagus (cut) Inferior vena cava Renal artery • Kidneys are major excretory organs Adrenal gland Renal hilum • Urinary bladder is the temporary storage Aorta Renal vein reservoir for urine Kidney Iliac crest • Ureters transport urine from the kidneys to Ureter the bladder • Urethra transports urine out of the body Rectum (cut) Uterus (part of female reproductive Urinary system) bladder Urethra Figure 25.1 Kidney Functions Kidney Functions • Removal of toxins, metabolic wastes, and • Gluconeogenesis during prolonged fasting excess ions from the blood • Endocrine (hormone) functions • Regulation of blood volume, chemical – Renin: regulation of blood pressure and kidney composition, and pH function • Activation of vitamin D (metabolism) 1 2/29/2016 Kidney Anatomy Kidney Anatomy • Retroperitoneal, in the superior lumbar region • Layers of supportive tissue • Right kidney is lower than the left 1. Renal fascia • The anchoring outer layer of dense fibrous connective • Convex lateral surface, concave medial surface tissue • Ureters, renal blood vessels, lymphatics, and 2. Perirenal fat capsule nerves enter and exit at the hilum • A fatty cushion 3.
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Kidney Structure Renal Lobe Renal Lobule
Kidney Structure Capsule Hilum • ureter → renal pelvis → major and minor calyxes • renal artery and vein → segmental arteries → interlobar arteries → arcuate arteries → interlobular arteries Medulla • renal pyramids • cortical/renal columns Cortex • renal corpuscles • cortical labryinth of tubules • medullary rays Renal Lobe Renal Lobule = renal pyramid & overlying cortex = medullary ray & surrounding cortical labryinth Cortex Medulla Papilla Calyx Sobotta & Hammersen: Histology 1 Uriniferous Tubule Nephron + Collecting tubule Nephron Renal corpuscle produces glomerular ultrafiltrate from blood Ultrafiltrate is concentrated • Proximal tubule • convoluted • straight • Henle’s loop • thick descending • thin • thick ascending • Distal tubule • Collecting tubule Juxtaglomerular apparatus • macula densa in distal tubule •JG cells in afferent arteriole •extraglomerular mesangial cells Glomerulus • fenestrated capillaries • podocytes • intraglomerular mesangial cells 2 Urinary Filtration Urinary Membrane Membrane Podocytes • Endothelial cell • 70-90 nm fenestra restrict proteins > 70kd • Basal lamina • heparan sulfate is negatively charged • produced by endothelial cells & podocytes • phagocytosed by mesangial cells • Podocytes • pedicels 20-40 nm apart • diaphragm 6 nm thick with 3-5 nm slits • podocalyxin in glycocalyx is negatively charged 3 Juxtaglomerular Apparatus Macula densa in distal tubule • monitor Na+ content and volume in DT • low Na+: • stimulates JG cells to secrete renin • stimulates JG cells to dilate afferent arteriole • tall,
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(A) Adrenal Gland Inferior Vena Cava Iliac Crest Ureter Urinary Bladder
Hepatic veins (cut) Inferior vena cava Adrenal gland Renal artery Renal hilum Aorta Renal vein Kidney Iliac crest Ureter Rectum (cut) Uterus (part of female Urinary reproductive bladder system) Urethra (a) © 2018 Pearson Education, Inc. 1 12th rib (b) © 2018 Pearson Education, Inc. 2 Renal cortex Renal column Major calyx Minor calyx Renal pyramid (a) © 2018 Pearson Education, Inc. 3 Cortical radiate vein Cortical radiate artery Renal cortex Arcuate vein Arcuate artery Renal column Interlobar vein Interlobar artery Segmental arteries Renal vein Renal artery Minor calyx Renal pelvis Major calyx Renal Ureter pyramid Fibrous capsule (b) © 2018 Pearson Education, Inc. 4 Cortical nephron Fibrous capsule Renal cortex Collecting duct Renal medulla Renal Proximal Renal pelvis cortex convoluted tubule Glomerulus Juxtamedullary Ureter Distal convoluted tubule nephron Nephron loop Renal medulla (a) © 2018 Pearson Education, Inc. 5 Proximal convoluted Peritubular tubule (PCT) Glomerular capillaries capillaries Distal convoluted tubule Glomerular (DCT) (Bowman’s) capsule Efferent arteriole Afferent arteriole Cells of the juxtaglomerular apparatus Cortical radiate artery Arcuate artery Arcuate vein Cortical radiate vein Collecting duct Nephron loop (b) © 2018 Pearson Education, Inc. 6 Glomerular PCT capsular space Glomerular capillary covered by podocytes Efferent arteriole Afferent arteriole (c) © 2018 Pearson Education, Inc. 7 Filtration slits Podocyte cell body Foot processes (d) © 2018 Pearson Education, Inc. 8 Afferent arteriole Glomerular capillaries Efferent Cortical arteriole radiate artery Glomerular 1 capsule Three major renal processes: Rest of renal tubule 11 Glomerular filtration: Water and solutes containing smaller than proteins are forced through the filtrate capillary walls and pores of the glomerular capsule into the renal tubule. Peritubular 2 capillary 2 Tubular reabsorption: Water, glucose, amino acids, and needed ions are 3 transported out of the filtrate into the tubule cells and then enter the capillary blood.
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The Distal Convoluted Tubule and Collecting Duct
Chapter 23 *Lecture PowerPoint The Urinary System *See separate FlexArt PowerPoint slides for all figures and tables preinserted into PowerPoint without notes. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Introduction • Urinary system rids the body of waste products. • The urinary system is closely associated with the reproductive system – Shared embryonic development and adult anatomical relationship – Collectively called the urogenital (UG) system 23-2 Functions of the Urinary System • Expected Learning Outcomes – Name and locate the organs of the urinary system. – List several functions of the kidneys in addition to urine formation. – Name the major nitrogenous wastes and identify their sources. – Define excretion and identify the systems that excrete wastes. 23-3 Functions of the Urinary System Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Diaphragm 11th and 12th ribs Adrenal gland Renal artery Renal vein Kidney Vertebra L2 Aorta Inferior vena cava Ureter Urinary bladder Urethra Figure 23.1a,b (a) Anterior view (b) Posterior view • Urinary system consists of six organs: two kidneys, two ureters, urinary bladder, and urethra 23-4 Functions of the Kidneys • Filters blood plasma, separates waste from useful chemicals, returns useful substances to blood, eliminates wastes • Regulate blood volume and pressure by eliminating or conserving water • Regulate the osmolarity of the body fluids by controlling the relative amounts of water and solutes
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