2. A Draw a labelled structure rabbit male reproductive system.
B. Define and explain reproduction in animals.
Answers
Ans 1 : In the rabbits, the male reproductive system has two parts viz. the reproductive organs and accessory glands. The main organ or male gonad is testis which is present in the scrotum.
(1) Scrotum: The scrotum is a pouch arising from lower abdominal wall. Scrotum protects the testes and acts as thermoregulator.
(2) Testes: Testes are primary sex organs. There are germinal epithelial cell which produce the sperms. Seminiferous tubules consists of spermatogonia (sperm mother cells). There are interstitial cells or which secrete the hormone testosterone.
(3) Vasa deferens : These are the long tube like structure which are responsible for the transport of the sperms. Vasa efferentia are a pair of ducts starting from the rete testis and entering in the epididymis. A pair of tubular structures arising from cauda epididymis are called vasa deferentia.
(4) Epididymis: Epididymis are paired structures which are highly coiled duct situated on the posterior border of each testis. It is differentiated into the following three regions. Caput epididymis which is upper wider head that receives vasa efferentia. The sperms undergo physiological maturation acquiring increased motility and fertilizing capacity. Corpus epididymis which is middle narrower body. Cauda epididymis which is a lower duct or tail. In the tail, sperms remain for short period and then enter the vas deferens.
(5) Urethra: The urethra is a part which extends to form the penis. Urethra carries both urine and semen.
(6) Penis: Penis is the copulatory organ used for insemination or deposition of sperms in female genital tract. Through the length of penis passes the urethra.
Accessory sex glands
Ans 2:
Reproduction (or procreation) is the biological process by which new “offspring” are produced from their “parents”. Asexual reproduction yields genetically-identical organisms because an individual reproduces without another.
