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Te2, Part Iii
TERMINOLOGIA EMBRYOLOGICA Second Edition International Embryological Terminology FIPAT The Federative International Programme for Anatomical Terminology A programme of the International Federation of Associations of Anatomists (IFAA) TE2, PART III Contents Caput V: Organogenesis Chapter 5: Organogenesis (continued) Systema respiratorium Respiratory system Systema urinarium Urinary system Systemata genitalia Genital systems Coeloma Coelom Glandulae endocrinae Endocrine glands Systema cardiovasculare Cardiovascular system Systema lymphoideum Lymphoid system Bibliographic Reference Citation: FIPAT. Terminologia Embryologica. 2nd ed. FIPAT.library.dal.ca. Federative International Programme for Anatomical Terminology, February 2017 Published pending approval by the General Assembly at the next Congress of IFAA (2019) Creative Commons License: The publication of Terminologia Embryologica is under a Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) license The individual terms in this terminology are within the public domain. Statements about terms being part of this international standard terminology should use the above bibliographic reference to cite this terminology. The unaltered PDF files of this terminology may be freely copied and distributed by users. IFAA member societies are authorized to publish translations of this terminology. Authors of other works that might be considered derivative should write to the Chair of FIPAT for permission to publish a derivative work. Caput V: ORGANOGENESIS Chapter 5: ORGANOGENESIS -
Comparative Reproductive Biology
Comparative Reproductive Biology Edited by Heide Schatten, PhD Gheorghe M. Constantinescu, DVM, PhD, Drhc Comparative Reproductive Biology Comparative Reproductive Biology Edited by Heide Schatten, PhD Gheorghe M. Constantinescu, DVM, PhD, Drhc Heide Schatten, PhD, is an Associate Professor at the University of Missouri, Columbia. She is well published in the areas of cytoskeletal regulation in somatic and reproductive cells and on cytoskeletal abnormalities in cells affected by disease, cellular and molecular biology, cancer biology, reproductive biology, developmental biology, microbiology, space biology, and microscopy. A member of the American Society for Cell Biology, American Association for the Advancement of Science, Microscopy Society of America, and American Society for Gravitational and Space Biology, she has received numerous awards including grant awards from NSF, NIH, and NASA. Gheorghe M. Constantinescu, DVM, PhD, Drhc, is a Professor of Veterinary Anatomy and Medical Illustrator at the College of Veterinary Medicine of the University of Missouri-Columbia. He is a member of the American, European and World Associations of Veterinary Anatomists and also author of more than 380 publications, including Clinical Anatomy for Small Animal Practitioners (Blackwell, 2002) translated in three languages. During his career of more than 50 years, he has been honored by numerous invited presentations, awards, diplomas, and certificates of recognition. ©2007 Blackwell Publishing All rights reserved Blackwell Publishing Professional 2121 -
Structure of Pronephros and Development of Mesonephric Kidney in Larvae of Russian Sturgeon, Acipenser Gueldenstaedtii Brandt (Acipenseridae)
Zoologica5 PRONEPHROS Poloniae-AND (2012)-MESONEPHRIC 57/1-4: 5-20-KIDNEY-IN-LARVAE-OF-A.-GUELDENSTAEDTII 5 DOI: 10.2478/v10049-012-0001-6 STRUCTURE OF PRONEPHROS AND DEVELOPMENT OF MESONEPHRIC KIDNEY IN LARVAE OF RUSSIAN STURGEON, ACIPENSER GUELDENSTAEDTII BRANDT (ACIPENSERIDAE) L.S. KRAYUSHKINA*1, A.A. GERASIMOV1, A.A. KIRSANOV1, M.V. MOSYAGINA1, A. OGORZA£EK2 1Department of Ichthyology and Hydrobiology, St. Petersburg State University, 16-th Line 29, 199178, St. Petersburg, Russia, [email protected] 2 Department of Animal Developmental Biology, Zoological Institute, University of Wroclaw, Sienkiewicza 21, 50-335 Wroclaw, Poland. *Corresponding author Abstract. The structure of the pronephros and development of mesonephric kidney in Russian sturgeon larvae, Acipenser gueldenstaedtii Brandt at different stages of early postembryonic development (from hatching to 14 days), were studied with histological and electronic microscopy methods. The larval pronephros is represented by the system of bilaterally located pronephric tubules with ciliated nephrostomes and funnels and exog- enous single glomus, which is not integrated directly into pronephric tubules and located in the pronephric chamber. The glomus is positioned below the dorsal aorta and vascular- ized by its capillaries. The glomus has the same features of the thin structure that are typical of and necessary for the function of a filtering organ. The structure of the prone- phros in acipenserids is discussed and compared with teleosts and amphibians. Histogen- esis of the mesonephric kidney is observed during the period of pronephros functioning; it is complete by the time the larvae transfer to exogenous feeding. At this moment, the pronephros undergoes significant structural degradation. -
Vocabulario De Morfoloxía, Anatomía E Citoloxía Veterinaria
Vocabulario de Morfoloxía, anatomía e citoloxía veterinaria (galego-español-inglés) Servizo de Normalización Lingüística Universidade de Santiago de Compostela COLECCIÓN VOCABULARIOS TEMÁTICOS N.º 4 SERVIZO DE NORMALIZACIÓN LINGÜÍSTICA Vocabulario de Morfoloxía, anatomía e citoloxía veterinaria (galego-español-inglés) 2008 UNIVERSIDADE DE SANTIAGO DE COMPOSTELA VOCABULARIO de morfoloxía, anatomía e citoloxía veterinaria : (galego-español- inglés) / coordinador Xusto A. Rodríguez Río, Servizo de Normalización Lingüística ; autores Matilde Lombardero Fernández ... [et al.]. – Santiago de Compostela : Universidade de Santiago de Compostela, Servizo de Publicacións e Intercambio Científico, 2008. – 369 p. ; 21 cm. – (Vocabularios temáticos ; 4). - D.L. C 2458-2008. – ISBN 978-84-9887-018-3 1.Medicina �������������������������������������������������������������������������veterinaria-Diccionarios�������������������������������������������������. 2.Galego (Lingua)-Glosarios, vocabularios, etc. políglotas. I.Lombardero Fernández, Matilde. II.Rodríguez Rio, Xusto A. coord. III. Universidade de Santiago de Compostela. Servizo de Normalización Lingüística, coord. IV.Universidade de Santiago de Compostela. Servizo de Publicacións e Intercambio Científico, ed. V.Serie. 591.4(038)=699=60=20 Coordinador Xusto A. Rodríguez Río (Área de Terminoloxía. Servizo de Normalización Lingüística. Universidade de Santiago de Compostela) Autoras/res Matilde Lombardero Fernández (doutora en Veterinaria e profesora do Departamento de Anatomía e Produción Animal. -
Germ Cells …… Do Not Appear …… Until the Sixth Week of Development
Reproductive System Session 1 Origin of the Sexes Lecture 1 Development of Male and Female Reproductive System 1 The genital system LANGMAN”S Medical Embryology Indifferent Embryo • Between week 1 and 6, female and male embryos are phenotypically indistinguishable, even though the genotype (XX or XY) of the embryo is established at fertilization. • By week 12, some female and male characteristics of the external genitalia can be recognized. • By week 20, phenotypic differentiation is complete. 4 Indifferent Embryo • The indifferent gonads develop in a longitudinal elevation or ridge of intermediate mesoderm called the urogenital ridge ❑ Initially…. gonads (as a pair of longitudinal ridges, the genital or gonadal ridges). ❑ Epithelium + Mesenchyme. ❑ Germ cells …… do not appear …… until the sixth week of development. • Primordial germ cells arise from the lining cells in the wall of the yolk sac at weeks 3-4. • At week 4-6, primordial germ cells migrate into the indifferent gonad. ➢ Male germ cells will colonise the medullary region and the cortex region will atrophy. ➢ Female germ cells will colonise the cortex of the primordial gonad so the medullary cords do not develop. 5 6 The genital system 7 8 • Phenotypic differentiation is determined by the SRY gene (sex determining region on Y). • which is located on the short arm of the Y chromosome. The Sry gene encodes for a protein called testes- determining factor (TDF). 1. As the indifferent gonad develops into the testes, Leydig cells and Sertoli cells differentiate to produce Testosterone and Mullerian-inhibiting factor (MIF), respectively. 3. In the presence of TDF, testosterone, and MIF, the indifferent embryo will be directed to a male phenotype. -
The Reproductive System
27 The Reproductive System PowerPoint® Lecture Presentations prepared by Steven Bassett Southeast Community College Lincoln, Nebraska © 2012 Pearson Education, Inc. Introduction • The reproductive system is designed to perpetuate the species • The male produces gametes called sperm cells • The female produces gametes called ova • The joining of a sperm cell and an ovum is fertilization • Fertilization results in the formation of a zygote © 2012 Pearson Education, Inc. Anatomy of the Male Reproductive System • Overview of the Male Reproductive System • Testis • Epididymis • Ductus deferens • Ejaculatory duct • Spongy urethra (penile urethra) • Seminal gland • Prostate gland • Bulbo-urethral gland © 2012 Pearson Education, Inc. Figure 27.1 The Male Reproductive System, Part I Pubic symphysis Ureter Urinary bladder Prostatic urethra Seminal gland Membranous urethra Rectum Corpus cavernosum Prostate gland Corpus spongiosum Spongy urethra Ejaculatory duct Ductus deferens Penis Bulbo-urethral gland Epididymis Anus Testis External urethral orifice Scrotum Sigmoid colon (cut) Rectum Internal urethral orifice Rectus abdominis Prostatic urethra Urinary bladder Prostate gland Pubic symphysis Bristle within ejaculatory duct Membranous urethra Penis Spongy urethra Spongy urethra within corpus spongiosum Bulbospongiosus muscle Corpus cavernosum Ductus deferens Epididymis Scrotum Testis © 2012 Pearson Education, Inc. Anatomy of the Male Reproductive System • The Testes • Testes hang inside a pouch called the scrotum, which is on the outside of the body -
Abnormalities and Position-Converted
Medical Academy named after S. I. Georgievsky Chair of obstetrics, gynecology and perinatology # 1 Abnormalities of development and position of the internal female genitalia Livshyts I. V. PhD, Associate Professor • Congenital malformations of the female genital tract are defined as deviations from normal anatomy resulting from embryological maldevelopment of the Mullerian or paramesonephric ducts. • They represent a rather common benign condition with a prevalence of 4–7% • Müllerian malformations are frequently associated with abnormalities of the renal and axial skeletal systems Grimbizis et al., 2001; Saravelos et al., 2008; Chan et al., 2011a Early embryo development • Until 8 weeks' gestation, the human fetus is undifferentiated sexually and contains both male (wolffian) and female (müllerian) genital ducts. • Wolffian structures (in the male fetus) differentiate into the vas deferens, epididymis, and seminal vesicles. Wolffian (mesonephric) duct • In the female fetus, with the absence of testosterone secretion, the Wolffian duct regresses, but inclusions may persist. • The epoophoron and Skene's glands may be present. • Also, lateral to the wall of the vagina a Gartner's duct or cyst could develop as a remnant. Speroff L. et al., 2005 Müllerian (paramesonephric) ducts • Paired ducts of the embryo that run down the lateral sides of the urogenital ridge and terminate at the sinus tubercle in the primitive urogenital sinus. • In the female, without the influence of AMH, they will develop to form the fallopian tubes, uterus, cervix, and the upper one-third of the vagina. • In the absence of testosterone and dihydrotestosterone, the genital tubercle develops into the clitoris, and the labioscrotal folds do not fuse, leaving labia minora and majora. -
Clinical Pelvic Anatomy
SECTION ONE • Fundamentals 1 Clinical pelvic anatomy Introduction 1 Anatomical points for obstetric analgesia 3 Obstetric anatomy 1 Gynaecological anatomy 5 The pelvic organs during pregnancy 1 Anatomy of the lower urinary tract 13 the necks of the femora tends to compress the pelvis Introduction from the sides, reducing the transverse diameters of this part of the pelvis (Fig. 1.1). At an intermediate level, opposite A thorough understanding of pelvic anatomy is essential for the third segment of the sacrum, the canal retains a circular clinical practice. Not only does it facilitate an understanding cross-section. With this picture in mind, the ‘average’ of the process of labour, it also allows an appreciation of diameters of the pelvis at brim, cavity, and outlet levels can the mechanisms of sexual function and reproduction, and be readily understood (Table 1.1). establishes a background to the understanding of gynae- The distortions from a circular cross-section, however, cological pathology. Congenital abnormalities are discussed are very modest. If, in circumstances of malnutrition or in Chapter 3. metabolic bone disease, the consolidation of bone is impaired, more gross distortion of the pelvic shape is liable to occur, and labour is likely to involve mechanical difficulty. Obstetric anatomy This is termed cephalopelvic disproportion. The changing cross-sectional shape of the true pelvis at different levels The bony pelvis – transverse oval at the brim and anteroposterior oval at the outlet – usually determines a fundamental feature of The girdle of bones formed by the sacrum and the two labour, i.e. that the ovoid fetal head enters the brim with its innominate bones has several important functions (Fig. -
Cranial Cavitry
Embryology Endo, Energy, and Repro 2017-2018 EMBRYOLOGY OF THE REPRODUCTIVE SYSTEM Janine Prange-Kiel, Ph.D. Office: L1.106, Phone: 83117 Email: [email protected] LEARNING OBJECTIVES: • Name the structures in kidney development that contribute to the development of the reproductive organs. • Predict how the presence or absence of the Y chromosome and the expression of the SRY gene would influence the development of the gonads. • Predict how the presence or absence of testosterone, dihydrotestosterone, and anit- Mullerian hormone would influence the development of the genital ducts and indifferent primordia of the external genitalia. I. Introduction In general, the function of the genital (reproductive) system in males and females is the formation, nurture, and transport of germ cells. In females, an additional function is to provide the proper milieu for the fetal development after conception. Like the urinary system, the genital system derives from intermediate mesoderm. The development of these two systems is tightly interwoven as structures that develop as parts of the urinary system gain function in the genital system. In the adult, the sexual organs differ between males and females. The early genital system, however, is similar in both sexes, and the sexual differentiation of this initially indifferent, bipotential system starts only in the seventh week of embryonic development. The details on how sexual differentiation is determined will be discussed below, but it is worth mentioning here that irregularities in this process result in disorders of sexual differentiation (DSDs). DSDs occur in approximately 1 in 4,500 live births and will be discussed in a separate lecture. -
441 2004 Article BF00572101.Pdf
(Department of Zoology, University of Michigan.) CONTRIBUTIONS ON THE DEVELOPMENT OF THE REPRODUCTIVE SYSTEM IN THE I~USK TURTLE, STERNOTHERUS ODORATUS (LATREILLE). II. GONADOGENESIS AND SEX DIFFERENTIATION1. By PAUL L. RISLEY. With 41 figures in the text. (Eingegangen am 5. Januar 1933.) Table of Contents. gage I. Introduction .......................... 493 II. Materials and methods ...................... 494 III. Observations .......................... 495 A. The undifferentiated or indifferent gonads ........... 495 B. The development of cortex and medulla (The bisexual or indetermin- ate gonads) ......................... 501 C. Sex differentiation ...................... 509 1. Macroscopic observations .................. 509 2. Microscopic observations ................. 515 a) The development of the ovary .............. 515 b) The development of the testis .............. 519 c) Sex reversal ...................... 523 IV. Literature and discussion .................... 525 V. Summary and conclusions .................... 538 VI. Literature cited ......................... 540 I. Introduction. In the previous contribution (1933) of this series, I followed the embryonic origin and migration of the primordial germ cells from an extraregional position in the posterior and lateral margins of the area pellucida to a resident location in the undifferentiated germ glands. In this paper, the investigation of the problem of the embryonic history of the germ cells is extended to include the problems of gonadogenesis and sex differentiation, which -
Urinary System Intermediate Mesoderm
Urinary System Intermediate mesoderm lateral mesoderm: somite ectoderm neural NOTE: Intermediate mesoderm splanchnic groove somatic is situated between somites and lateral mesoderm (somatic and splanchnic mesoderm bordering the coelom). All mesoderm is derived from the primary mesen- intermediate mesoderm endoderm chyme that migrated through the notochord coelom (becomes urogenital ridge) primitive streak. Intermediate mesoderm (plus adjacent mesothelium lining the coelom) forms a urogenital ridge, which consists of a laterally-positioned nephrogenic cord (that forms kidneys & ureter) and a medially-positioned gonadal ridge (for ovary/testis & female/male genital tract formation). Thus urinary & genital systems have a common embryonic origin; also, they share common ducts. NOTE: Urine production essentially requires an increased capillary surface area (glomeruli), epithelial tubules to collect plasma filtrate and extract desirable constituents, and a duct system to convey urine away from the body. Kidneys Bilateraly, three kid- mesonephric duct neys develop from the neph- metanephros pronephros rogenic cord. They develop mesonephric tubules chronologically in cranial- mesonephros caudal sequence, and are designated pro—, meso—, Nephrogenic Cord (left) and meta—, respectively. cloaca The pronephros and mesonephros develop similarly: the nephrogenic cord undergoes seg- mentation, segments become tubules, tubules drain into a duct & eventually tubules disintegrate. spinal ganglion 1] Pronephros—consists of (7-8) primitive tubules and a pronephric duct that grows caudally and terminates in the cloaca. The tubules soon degenerate, but the pronephric duct persists as the neural tube mesonephric duct. (The pronephros is not functional, somite except in sheep.) notochord mesonephric NOTE tubule The mesonephros is the functional kidney for fish and am- aorta phibians. The metanephros is the functional kidney body of reptiles, birds, & mammals. -
Reproductionreview
REPRODUCTIONREVIEW Cryptorchidism in common eutherian mammals R P Amann and D N R Veeramachaneni Animal Reproduction and Biotechnology Laboratory, Colorado State University, Fort Collins, Colorado 80523-1683, USA Correspondence should be addressed to R P Amann; Email: [email protected] Abstract Cryptorchidism is failure of one or both testes to descend into the scrotum. Primary fault lies in the testis. We provide a unifying cross-species interpretation of testis descent and urge the use of precise terminology. After differentiation, a testis is relocated to the scrotum in three sequential phases: abdominal translocation, holding a testis near the internal inguinal ring as the abdominal cavity expands away, along with slight downward migration; transinguinal migration, moving a cauda epididymidis and testis through the abdominal wall; and inguinoscrotal migration, moving a s.c. cauda epididymidis and testis to the bottom of the scrotum. The gubernaculum enlarges under stimulation of insulin-like peptide 3, to anchor the testis in place during gradual abdominal translocation. Concurrently, testosterone masculinizes the genitofemoral nerve. Cylindrical downward growth of the peritoneal lining into the gubernaculum forms the vaginal process, cremaster muscle(s) develop within the gubernaculum, and the cranial suspensory ligament regresses (testosterone not obligatory for latter). Transinguinal migration of a testis is rapid, apparently mediated by intra-abdominal pressure. Testosterone is not obligatory for correct inguinoscrotal migration of testes. However, normally testosterone stimulates growth of the vaginal process, secretion of calcitonin gene-related peptide by the genitofemoral nerve to provide directional guidance to the gubernaculum, and then regression of the gubernaculum and constriction of the inguinal canal. Cryptorchidism is more common in companion animals, pigs, or humans (2–12%) than in cattle or sheep (%1%).