Excretory System

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Excretory System Excretory System • Functions • Removes wastes from blood • Removes harmful substances from blood • Regulates body fluids • Maintains homeostasis • Main Parts • Kidneys • Urinary bladder • Large intestine • Lungs • Skin Urinary System: • Not all the waste products that leave the body are solid. • Most liquid wastes formed by the body are excreted by the urinary system. Bladder • Muscular sac in the pelvis • Urine is made in the kidneys and travels down two tubes called ureters to the bladder • Urine exits the bladder into the urethra, which carries out of the body Large Intestine: • The undigested material not absorbed by the large intestine forms a semi- solid waste product known as feces. These solid wastes are removed by the body through the rectum. Kidneys: • The main organs of the urinary system • Bean-shaped organs in your abdomen that filter blood and remove waste. • The wastewater, or urine, that has been filtered out of the blood moves into the ureters, tubes that connect the kidneys to the bladder. • The bladder is a muscular sac that holds urine until it exits the body through the urethra. The Lungs: • The lungs are another part of the excretory system. • Lungs are part of the respiratory system, also. • Wastes removed by the lungs include carbon dioxide and water vapor produced by cellular respiration. The Skin • The skin also functions in excretion. • Sweat glands in the skin produce perspiration. • When a person perspires, the skin excretes water and salts. Working Together Works with the circulatory system in transporting blood through kidneys. Urea, uric acid, and water are removed from the blood and most of the water is put back in the system. Works with endocrine system to help monitor your kidney function. Such as if you drink too much water, hormones are released to allow for urine production. If you are dehydrated, less urine will be produced..

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Primary Excretory System Organs Kidneys Are Bean-Shaped Organs of a Reddish Brown Colour That Are Found in the Sides of the Vertebral Column
Organs in the Excretory System and Their Functions The excretory system is essential to one’s health. Its responsibility is to remove waste from the body. The excretory system is made up of numerous organs that work in unison to ensure that waste is effectively removed from your body. Below are the details of the organs of excretory system, along with the roles they play in detoxification. Primary Excretory System Organs Kidneys are bean-shaped organs of a reddish brown colour that are found in the sides of the vertebral column. Once the body has extracted what it needs from food and drink, it sends the wastes to the kidneys. The kidneys filter the wastes, including urea, salt and excess water, which are flushed out of the body as urine. s 2. Skin The skin performs its excretory function via the sweat glands. These glands produce sweat that contains salt, excess oils, water, and other unnecessary substances which are then excreted out of the body through small pores. Sweating also helps to cool the body during evaporation. 3. Lungs The lungs are very important excretory organs as they expel carbon dioxide from the body via exhalation. The lungs use cells known as alveoli to remove the carbon dioxide from our blood. Otherwise, the carbon dioxide would accumulate and have a detrimental effect to our body. Accessary Excretory System Organs 1. Liver Although considered a secondary, or accessary excretory system organ, the liver plays a vital part in keeping the body clean. Harmful poisons and chemicals that are either produced in the body or consumed are broken down and detoxified by the liver.
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Syrian Private University Medical Faculty Medical Terminology M.A.Kubtan , MD – FRCS Lecture 9 M.A.Kubtan Objectives After studying this chapter, you will be able to: •Name the parts of the urinary system and discuss the function of each part •Define combining forms used in building words that relate to the urinary system •Identify the meaning of related abbreviations •Name the common diagnoses, clinical procedures, and laboratory tests used in treating disorders of the urinary system M.A.Kubtan 2 Objectives Part 2 •List and define the major pathological conditions of the urinary system •Explain the meaning of surgical terms related to the urinary system •Recognize common pharmacological agents used in treating the urinary system M.A.Kubtan 3 Structure and Function The Urinary System Bladder Kidneys •Also called the excretory system •Maintains water Urinary System balance •Removes waste products from the Urethra Ureters blood by excreting them in the urine Meatus M.A.Kubtan 4 Kidneys Kidneys The kidneys are bean-shaped organs located in the retroperitoneal portion of the abdominal cavity on either side of the vertebral column. Two Primary Functions •To form urine for excretion •To retain essential substances the body needs in the process called reabsorption M.A.Kubtan 5 Parts of the Kidney Kidneys filter about 1700 kidney liters of blood daily in the average adult. medulla Parts of the kidneys •Cortex hilum -outer protective portion •Medulla -inner soft portion •Hilum -a depression located in the middle of the concave side of the kidney where blood vessels, nerves, and the ureters enter and cortex exit the kidneys M.A.Kubtan 6 Urine Production Urine is produced by filtration of: •water •sugar •creatine •salts •urea •uric acid Each kidney contains more than 1 million nephrons which are the functional units of the kidneys.
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Anatomy and Physiology Male Reproductive System References
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The Urinary System Dr
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Laboratory 8 - Urinary and Reproductive Systems Urinary System Please read before starting: It is easy to damage the structures of the reproductive system as you expose structures associated with excretion, so exercise caution as you do this. Please also note that we will have drawings available as well to help you find and identify the structures described below. The major blood vessels serving the kidneys are the Renal renal artery and the renal pyramid vein., which are located deep in the parietal peritoneum. The renal artery is a branch of the dorsal aorta that comes off Renal further caudal than the cranial pelvis mesenteric artery. Dissect the left kidney in situ, dividing it into dorsal and ventral portions by making a frontal section along the outer periphery. Observe the renal cortex renal medulla (next layer in) renal pyramids renal pelvis ureter (see above diagram) The kidneys include a variety of structures including an arterial supply, a venous return, extensive capillary networks around each nephron and then, of course, the filtration and reabsorption apparatus. These structures are primarily composed of nephrons (the basic functional unit of the kidney) and the ducts which carry urine away from the nephron (the collecting ducts and larger ducts eventually draining these into the ureters from each kidney. The renal pyramids contain the extensions of the nephrons into the renal medulla (the Loops of Henle) and the collecting ducts. Urine is eventually emptied into the renal pelvis before leaving the kidneys in the ureters. The ureters leaves the kidneys medially at approximately the midpoint of the organs and then run caudal to the urinary bladder.
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Urinary System
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