Question

Which one is correct for mammalian testis?
A. Graafian follicle, Sertoli cells,Leydig Cells
B. Graafian follicle, Sertoli cells and Seminiferous tubules
C. Graafian follicle, Leydig Cellsand Seminiferous tubules
D. Sertoli cells, Seminiferous tubules, Leydig Cells

Answer 1

Hint: the reproductive system helps in the reproduction meaning production of own copies. It may be of two types
-Male reproductive system or testis (testes in plural) – a pair of testis is found only in males and produces male gametes, also called sperms.
-Female reproductive system or ovary– a pair of ovaries is found only in females. It produced female gamete or ovum.
Both male and female reproductive organs are made up of a number of different types of cells and parts. These cells or parts perform different functions to produce sperms and ovums.

Complete answer:
Graafian follicle is found in the female reproductive organ or ovary. It contains the growing ovum enclosed within it. This enclosed ovum got released by ovulation, release of ovum.
Sertoli cells are found in the male reproductive organ or testis. It acts as a nurse cell. It is a part of seminiferous tubules and it helps in the formation of sperms during spermatogenesis. It provides nourishment to spermatozoa.
Seminiferous tubules are found in the male reproductive organ or testis. These are coiled tubes. It is the main site of germination of sperms and their maturation. It also helps in the transportation of sperms or spermatozoa. The seminiferous tubules are coated or lined by cells of sertoli that nourish the sperms.
Leydig Cells are also found in testes. They are also called interstitial cells. They are found near the seminiferous tubules and produce testosterone (male hormone) with the help of luteinizing hormone (LH).
Thus the option D is correct as the Sertoli Cells, Seminiferous tubules andLeydig Cells all are found in the male reproductive organ also called as testis (testes in plural).

Hence, the correct answer is option (D).

Note: When the male and female gamete are combined together, they form zygote. The process of fusion of male and female gametes and formation of zygote is called fertilization. After fertilization the zygote gets attached to the wall of the uterus and starts growing by cell division and cell differentiation into embryos.