Title Human-Reproduction.pdf ✅

Human Reproduction 2. Duct System y The intratesticular duct system starts with tubuli refti, which are the short and straight end segments of the seminiferous tubules; these tubles open into vasa efferentia, through rete testis. y Vasa efferentia conduct the sperms out from the testis and open into the epididymis. y Epididymis is a single convoluted tubule that is located along the posterior surface of the testis. y The epididymis continues as the vas deferens that ascends into the abdominal or pelvic cavity through inguinal canal. y It loops over the urinary bladder and receives a duct from the seminal vesicle (of its side) to form ejaculatory duct that runs through the prostate and opened into the prostatic urethra, just after its other gene from the urinary bladder. y The urethra receives the ducts of prostate gland and the bulbourethral (Cowper’s) glands a little ahead and runs through the penis to its external opening; called urethral meatus. Accessory Glands y The accessory glands of male reproductive system include: ○ a pair of seminal vesicles, ○ a prostate gland and ○ a pair of bulbourethral glands (also called Cowper’s glands) y Their secretions are collectively called as seminal plasma. y Seminal plasma is rich fructose, calcium, and certain enzymes; it provides nutrition and a medium for the spermatozoa to swim in the female reproductive tract. y The seminal plasma along with the spermatozoa, is called semen. Rack Your Brain Cilia are present in which of the following? Vasa efferentia, vasa deferentia or penis. Previous Year’s Question Vasa efferentia are the ductules leading from (1) testicular lobules to rete testis (2) rete testis to vas deferens (3) vas deferens to epididymis (4) epididymis to urethra Rack Your Brain Physiological maturation of sperms occurs in which part of the male reproductive system? Previous Year’s Question Seminal plasma in human males is rich in (1) fructose and calcium (2) glucose and calcium (3) DNA and testosterone (4) ribose and potassium

Human Reproduction 4. The Duct System Fallopian Tube y A fallopian tube extends from the periphery of each ovary to the uterus; it is a muscular tube of about 10–12 cm long situated above and behind the urinary bladder. y The part of fallopian tube closer to the ovary is funnel-shaped and is called infundibulum. y The edges of the infundibulum possess finger- like projections, called fimbriae, that help in collecting the ovum during ovulation. y The infundibulum leads into a wider part of the fallopian tube or oviduct, called ampulla. y The last part of the fallopian tube that joins the uterus is narrow and it is called isthmus. Previous Year’s Question The part of Fallopian tube closest to the ovary is (1) isthmus (2) infundibulum (3) cervix (4) ampulla Previous Year’s Question How many sperms are formed from a secondary spermatocyte? (1) 4 (2) 8 (3) 2 (4) 1