![]() The secretion of the prostate gland is slightly alkaline, thin, and milky colored. Prostate Gland: The prostate gland is a dense structure that is placed just inferior to the urinary bladder. The high fructose content gives nutrient energy to the spermatozoa. ![]() This fluid is rich in enzymes, proteins, vitamin C, fructose, prostaglandins, and phosphorylcholine. Seminal Vesicles: The Seminal vesicles contribute a significant proportion of approximately 60-75% of the fluid in semen. This secretion mixes with the sperms to nourish and protect them. These glands secrete the seminal plasma that mainly contains fructose, calcium, and certain enzymes. There are mainly three types of accessory glands: Urethra: Urethra is a thin muscular tube that originates from the urinary bladder and then passes through the penis to its external opening known as the urethral meatus. Ejaculatory ducts store and transport the sperms from the testis to the outside via the urethra. ![]() It transports the sperm from the epididymis to the ejaculatory duct.Įjaculatory Duct: This duct is situated on each side of the prostate gland. Vas Deferens: Vas deferens is a muscular duct that ascends into the abdominal cavity and makes a loop over the urinary bladder. The Epididymis is sited on the backside of each testicle. Vasa Efferentia: These ducts make a pathway to transport the sperm from the rete testis to the epididymis which is placed in the posterior surface of each testis.Įpididymis: It is a long, coiled tube that connects a testicle to a vas deferens. Rete Testis: These are the ducts where the seminiferous tubules open into a series of channels. The male reproductive system consists of four accessory ducts: The accessory ducts facilitate the transportation of the sperms from the testes to the urethra for their release outside the body. Leydig cells synthesize and secrete the testicular hormones called androgens. Interstitial spaces are the region that presents outside the seminiferous tubule that contains the small blood vessels, Leydig cells, and some immunocompetent cells. Sertoli cells in seminiferous tubules provide nutrition to the spermatogonia. They contain 46 chromosomes in their cells. These spermatogonia are diploid in nature and called the immature germ cells and they form the sperm by the process of meiosis. Seminiferous tubules are the place that forms spermatozoa by the process of meiosis.Įach seminiferous tubule contains two types of cells i.e., spermatogonia and Sertoli cells in their inner lining. The testis contains about 250 compartments known as Testicular lobules.Įach lobule normally comprises 1-3 highly coiled seminiferous tubules that play a significant role in sperm production. Testis is oval in shape with the length of 4-5cm and 2-3cm wide. The lower temperature in testes is required for spermatogenesis as the normal human body temperature can lead to mutation in the sperms. This condition is necessary for the synthesis of sperms. The testes are sited outside the abdominal cavity to maintaining the low temperature of the testes nearly 2-2.5◦C lower than the average human body temperature. ![]() The scrotum is located behind the penis and is considered a part of the external male genitalia. Situated in the pelvic region outside the abdominal cavity within a pouch called a scrotum.Ī small muscular sac is known as Scrotum that contains and protects the testes. There are four main parts in the male reproductive system:
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