explain male reproductive system
The Male Reproductive System
It is located in the pelvic region.
It consists of:
A pair of testes
Accessory glands and ducts
Situated within the scrotum, which protects the testes and also helps in maintaining the temperature.
Each testis is 4 to 5 cm in length, and 2 to 3 cm in width, and has about 250 compartments called testicular lobules.
Testicular lobules have seminiferous tubules which are the sites of sperm formation.
Seminiferous tubules are lined by two types of cells:
Male germ cells − They undergo meiosis to form sperms.
Sertoli cells − They provide nourishment to the germ cells.
Region outside the seminiferous tubules is called the interstitial space, which contains Leydig cells (interstitial cells). The Leydig cells produce androgens.
Accessory Ducts and Glands
Accessory ducts include:
The seminiferous tubules open into the vasa efferentia through the rete testis.
The vasa efferentia open into the epididymis, which leads to the vas deferens. The vas deferens opens into the urethra along with a duct from the seminal vesicle called the ejaculatory duct.
The ejaculatory duct stores the sperms and transports them to the outside
The urethra starts from the urinary bladder, extends through the penis and opens via theurethral meatus.
Accessory glands include:
A pair of seminal vesicles
A pair of bulbourethral glands
The secretions of these glands make up the seminal plasma, and provide nutrition and a medium of motility to the sperms.