Male reproductive system

The prostate gland derives from the urogenital sinus, and the other embryonic structures differentiate into the external genitalia. In the absence of testicular secretions, the female genitalia are formed.

Male reproductive system

Genetic and congenital abnormalities In the male Congenital anomalies of the prostate gland and seminal vesicles are rare; they Male reproductive system of absence, hypoplasia underdevelopmentor the presence of fluid- or semisolid-filled sacs, called cysts.

Cysts of the prostatic utricle the uterine remnant found in the male are often found in association with advanced stages of hypospadias a defect in the urethra, see below and pseudohermaphroditisma condition in which sex glands are present but bodily appearance is ambiguous as to sex; i.

Cysts may also cause urinary obstructive symptoms through local pressure on the bladder neck. Severe anomalies of the penis are rare and are generally associated with urinary or other systemic defects that are incompatible with life.

Male reproductive system

Anomalies are those of absence, transposition, torsion twistingand duplication of the penis. An abnormally large penis frequently is present in males with precocious pubertydwarfisman overactive pituitary, or adrenal tumours.

A small penis is seen in infantilism and in underdevelopment of the genitals, or undersecretion of the pituitary or pineal glandand failure of development of the corpora cavernosa erectile tissue located on the dorsal side of the penis. The only anomaly of the foreskin is congenital phimosis, characterized by a contracture of the foreskin, or prepuce, which prevents its retraction over the glans the conical structure that forms the head of the penis ; the preputial opening may impede the flow of urine.

The condition is treated by circumcision. There is a considerable variety of urethral anomalies. Stenosis contracture of the external opening meatus is the most common, but congenital stricture of the urethra occasionally occurs at other points.

Valves or flaps across the anterior or posterior part of the urethra may cause congenital urethral obstruction in males. Posterior urethral valves are more common than anterior valves and consist of deep folds of mucous membraneoften paper-thin and usually attached at one end to the verumontanum, a small prominence in the back wall of the part of the urethra that is surrounded by the prostate gland.

If too tight, the valves may obstruct the urethra and damage the kidneys. Various defects are associated with incomplete closure of the urethra. One of the most common is hypospadiasin which the underside ventral side of the urethral canal is open for a distance at its outer end.

Anatomy of the Male Reproductive System Reproduction — the process by which organisms make more organisms like themselves — is one of the things that set living things apart from nonliving matter. But even though the reproductive system is essential to keeping a species alive, unlike other body systems it's not essential to keeping an individual alive.
Male Reproductive System Frequently Asked Questions What is infertility? In general, infertility is defined as not being able to get pregnant conceive after one year or longer of unprotected sex.
Physiology of the Male Reproductive System The human body and reproduction involve highly personal information and topics.

Frequently the meatus is narrowed, and the penis also has a downward curvature beyond the meatus. The posterior part of the urethra is never involved; therefore, the muscle that closes the urethra functions normally, and urinary control exists. Although the condition occurs in both sexes, it is seen predominantly in the male.

There is a high incidence of partial or complete failure of the testes to develop, of cryptorchidism failure of one or both of the testes to descend into the scrotumand of small external and internal genitalia.

Epispadiasan opening in the upper dorsal side of the penis, is considerably less common than hypospadias. Dorsal curvature may also be present, but the disabling aspect is that the defect usually extends through the urinary sphincter and causes urinary incontinence.

Other less common urethral anomalies include complete absence of the urethra, double urethra, urethra fistula an opening in the urethraurethrorectal fistula an opening between the urethra and the rectumand urethral diverticulum a pouch in the wall of the urethra.

Most of the above conditions are correctable by surgery. Anorchism absence of one or both testes is rare; it may be associated with the absence of various other structures of the spermatic tract. Generally, if one testis also called testicle is absent, the other is found to be within the abdomen rather than in the scrotum.

Congenitally small testes may be a primary disorder or may occur because of underactivity of the pituitary.

Age. Although advanced age plays a much more important role in predicting female infertility, couples in which the male partner is 40 years old or older are more likely to report difficulty conceiving. URL of this page: timberdesignmag.com Male Reproductive System. Male reproductive system terms Orchid/o, test/o Testes (male gonad) * Orchiditis, orchidectomy, testicular artery, testosterone (male sex hormone) Balan/o Head of .

In both disorders, there is a lack of development of secondary sexual characteristics and some deficiency in libido and potency. Supernumerary testicles are extremely rare; when present, one or more of the supernumerary testicles usually shows some disorder such as torsion of the spermatic cord.

Synorchism, the fusion of the two testicles into one mass, may occur within the scrotum or in the abdomen. Cryptorchidismthe most common anomaly of the spermatic tract, is the failure of one or both of the testes to descend spontaneously into the scrotum ; hormonal treatment may be useful in correcting the condition, but usually surgery is necessary for correction.

Page 1 of Explore the female reproductive system – interactive anatomy diagrams illustrate the function of the reproductive organs, from fertilization to birth.

Male reproductive system terms Orchid/o, test/o Testes (male gonad) * Orchiditis, orchidectomy, testicular artery, testosterone (male sex hormone) Balan/o Head of .

Reproductive System

Male reproductive organs or male reproductive system Side view. The main reproductive organs of the male body are the testes, which produce sperm and also male hormones, in the form of testosterone.

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The offspring formed by sexual reproduction contain genes from both parents and show considerable variation. For example, kittens in a litter are all different although they (usually) have the same mother and father. In the wild this variation is important because it means that when the environment.

from The Prostate Basics Menu The Male Urinary and Sexual System Items in bold correspond to the drawing: The bladder is emptied by way of the urethra, a tube passing through the prostate timberdesignmag.com main function of the prostate is to supply fluid for sperm that has been collected in the seminal timberdesignmag.comation is when the seminal .

Male reproductive system

The male reproductive system is a series of organs located outside of the body and around the pelvic region of a male that contribute towards the reproduction process.

The primary direct function of the male reproductive system is to provide the male sperm for fertilization of the ovum.

Anatomy and Physiology of Animals/Reproductive System - Wikibooks, open books for an open world