Testicular development, structure, and function

by NICHHD Workshop on the Testis Houston, Tex. 1979

Publisher: Raven Press in New York

Written in English
Cover of: Testicular development, structure, and function | NICHHD Workshop on the Testis Houston, Tex. 1979
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Edition Notes

Includes bibliographies and index.

Regulation of Ovarian and Testicular Function have centered around several organ systems that comprise the reproductive system and encompass molecular events and structure-function relationships. Correlates of Hormone Receptors in Reproduction" sponsored by the National Institute of Child Health and Human Development and the Format: Paperback. Scrotum, in the male reproductive system, a thin external sac of skin that is divided into two compartments; each compartment contains one of the two testes, the glands that produce sperm, and one of the epididymides, where the sperm is scrotum is a unique anatomical feature of humans and certain other species of land-dwelling is continuous with .   In the male reproductive system, the scrotum houses the testicles or testes (singular: testis), including providing passage for blood vessels, nerves, and muscles related to testicular function. The testes are a pair of male reproductive organs that produce sperm and some reproductive hormones. Each testis is approximately by cm ( by 1 in) in size Author: Charles Molnar, Jane Gair, Molnar, Charles, Gair, Jane. Sperm cells are gametes (sex cells) that are produced in the testicular organ (gonad) of male human beings and animals.. Like the female gamete (Oocyte), sperm cells carry a total of 23 chromosomes that are a result of a process known as meiosis. In both animals and human beings, among many other organisms, these cells are involved in the sexual mode of .

Objective. The presence of testicular appendices was prospectively evaluated in 89 boys with 96 undescended testes who underwent orchidopexy over the period of 4 years. Results. The patients were divided into two groups. Group A included 42 boys with 49 undescended testes positioned close to the internal inguinal ring, and Group B included 47 boys with 47 Cited by: 1. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF. Endocrine and exocrine function of the bovine testis. Chapter 2. Book Chapter. P. Interpretive Summary: The normal bovine male reproductive system consists of paired testes retained within a sack or purse-like structure known as the scrotum which is formed from the outpouching of skin from the abdomen, consisting of complex layers of.

Testicular development, structure, and function by NICHHD Workshop on the Testis Houston, Tex. 1979 Download PDF EPUB FB2

Get this from a library. Testicular development, structure, and function. [Anna Steinberger; Emil Steinberger; National Institute of Child Health and Human Development (U.S.);]. Book Notes | 1 June Testicular Development, Structure, and Function.

Based on a Workshop held in March by the National Institute of Child Health and Human Development. FULL TEXT. PDF. Not Available. Citations.

Citation. Testicular Development, Structure, and Function. Testicular develpment and differentiation; Spermatogenesis and steroidogenesis and their hormonal regulation; Membrane transpor and secretation of protein; Cyclic changes in testicular functions; Sperm motility and energetics.

During fetal testicular development, pro-Sertoli cells proliferate to increase their number within the testis cord in mice [–].In newborn murine testes, most pro-Sertoli cells already migrate to and reside on the basal membrane, although some remain in the center of the precursor seminiferous tubules (Figure ).During pubertal development, Sertoli cells continue to.

The male gonad is the testis (pl, testes). The initial difference in male and female gonad development are dependent on testis-determining factor (TDF) the protein product of the Y chromosome SRY gene.

Recent studies have indicated that additional factors may also be required for full differentiation. structure Testis, in animals, the organ that produces sperm, the male reproductive cell, and androgens, the male hormones.

In humans the testes occur as a pair of oval-shaped organs. They are contained within the scrotal sac, which is located directly behind the penis and in.

Since the symptoms of hypogonadism may be nonspecific, and the signs of testosterone deficiency can be subtle and slow to develop, the assessment of testicular function relies heavily Testicular development laboratory testing.

The laboratory diagnosis of hypogonadism is based on a consistent unequivocally low serum total testosterone level, but normal ranges vary with different Cited by: 3. Testicular function is critical for development of the normal masculine phenotype early in the prenatal period.

All the elements of the control system are present in the early embryo. GnRH and gonadotropins are detectable at about the time that testosterone begins stimulating wolffian duct.

The testes is where it all begins - sperm production, that is. The fate of a man's future generation all lies inside these two, golf-ball-sized organs that hang precariously just below his abdomen. Testes Structure and Function. produced a severe suppression of testicular function which could be prevented if androgens were injected simultaneously (Selye and Friedman, ; Gaarenstroom.

The testes The testes have two functions. The first is to produce spermatozoa and the second is to function as an endocrine organ. A portion of mesonephric cells develop into cords of tissue called seminiferous cords which incorporate the migrating primitive germ cells into their structure.

Testicle or testis (plural testes) is the male reproductive gland or gonad in all animals, including humans. It is homologous to the female functions of the testes are to produce both sperm and androgens, primarily terone release is controlled by the anterior pituitary luteinizing hormone; whereas sperm production is controlled both by the anterior Artery: Testicular artery.

This book is a comprehensive, multi-authored work on the structure and function of the mammalian testis. The approach emphasizes gene expression, translation and production of specific gene products and the cellular and molecular regulation of these fundamental processes.

Rather than provide a global survey of all aspects of male reproduction, this book stresses 5/5(2). Testicular torsion is a twisting of the spermatic cord and its contents and is a surgical emergency affecting permales younger than 18 years annually.

It accounts for 10% to 15% ofCited by: from book Introduction to Mammalian Mammalian Testes: Structure and Function. Testicular development proceeds through four main stages that. The function of the testis and thereby also the function of its compartments are governed by the hypothalamus and the pituitary gland (endocrine regulation).

These endocrine effects are mediated and modulated at the testicular level by local control mechanisms (paracrine and autocrine factors).Cited by: Get this from a library. The testicular descent in human: origin, development, and fate of the gubernaculum hunteri, processus vaginalis peritonei, and gonadal ligaments.

[K. The scrotum is an anatomical male reproductive structure located caudal to the penis that consists of a suspended dual-chambered sack of skin and smooth muscle.

It is present in most terrestrial male scrotum contains the external spermatic fascia, testes, epididymis, and ductus is a distention of the perineum and carries some abdominal tissues into Artery: Anterior scrotal artery & Posterior scrotal artery. Testicular Diseases () Definition (MEDLINEPLUS) Testicles, or testes, make male hormones and sperm.

They are two egg-shaped organs inside the scrotum, the. The collateral supply is enough for testis to survive even if the paired testicular arteries are ligated. Lymph drainage of testis: As was the case with blood supply, the lymphatic drainage of testis is also different from the scrotum.

The testicular lymph vessels follow the testicular arteries back to the para-aortic lymph nodes. function: produce milk structure: modified sweat glands that are really part of the integumentary system. each is contained within a rounded breast within HYPODERMIS (superficial fascia), anterior to the pectoral muscles of the thorax.

slightly below center of each breast is a ring of pigmented skin, AREOLA, which surrounds NIPPLE. large. Chapter 4 discusses in detail the endocrine factors responsible for testicular development and initiation of spermatogenesis in the bull, and thus this chapter focuses more on the regulation and function of the adult testes.

This chapter will not undertake a treatise of those conditions that disrupt testicular function but rather will focus, as. Germ Cells Definition, Formation, Vs Somatic, Function & in Cancer (in the next two weeks of embryo development), the germ cells start their migration towards the gonads as they proliferate.

Testicular germ cell tumors - A majority of the testicular cancers have been shown to start in the germ cells. These cancers are common in. Evaluation of testicular function.

Wang C, Swerdloff RS. The evaluation of testicular function is based primarily on a detailed medical history, a careful physical examination, basal measurements of FSH, LH and testosterone and a routine semen analysis. In a patient with androgen deficiency, the diagnosis can often be made with these basic by: About This Quiz & Worksheet.

Internally, a testicle is much more complex than what meets the eye externally. Some topics that the quiz tests include the. Testicular development and normal spermatogenesis require the proper function and coordination of a large number of transcription factors, steroid hormone and orphan receptors, and growth factors.

There are likely to be a large number of other, as yet unidentified genes that are necessary for male gonadal by: Start studying Chapter 27; The Reproductive System. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Describe the structure and function of the testes, and explain the importance of their location in the scrotum. Discuss hormonal regulation of testicular function and the physiological effects of. Testicular cancer is the most common type of cancer in men ages years.

Abnormal testicular development. Men whose testicles did not develop properly. The epididymis is a cord-like structure on the top and back of the testicle that stores and transports the sperm. development and structure of the testis.

normal male pubertal development. regulation of testicular function. regulation of the hypothalamic-pituitary-testis axis in adult man; the leydig cell: androgen synthesis; the seminiferous tubules: spermatogenesis; treatment; clinical and laboratory evaluation of male reproductive function.

history and. The fetal testis develops from the undifferentiated gonad after expression of a genetic cascade that is initiated by the SRY (sex-related gene on the Y chromosome) ().SRY induces differentiation of Sertoli cells, which surround germ cells and, together with peritubular myoid cells, form testis cords that will later develop into seminiferous tubules.

Rapid advances have taken place in various aspects of reproductive biology during the last decade. These advances have centered around several organ systems that comprise the reproductive system and encompass molecular events and structure-function relationships.

It becomes important to reviewBrand: Springer US. Development The Primary Sex Chord: proliferate from the coelomic epithelium condense and extend into the medulla of the gonad.

In the medulla: the cords branch, anastomose and form the rete testis The prominent sex cords become the seminiferous or testicular cords.These images are a random sampling from a Bing search on the term "Anatomy of the Penis." Click on the image (or right click) to open the source website in a new browser window.

condition in which there is a deviation from or interruption of the normal structure or function of the penis. Cardiovascular Medicine Book Dentistry Book.