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प्रश्न
Describe the structure of a seminiferous tubule.
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उत्तर
The production of sperm in the testes takes place in a highly coiled structure called the seminiferous tubules. These tubules are located in the testicular lobules. Each seminiferous tubule is lined by germinal epithelium. It is lined on its inner side by two types of cells, namely spermatogonia and sertoli cells respectively. Spermatogonia are male germ cells that produce primary spermatocytes via meiotic divisions. Primary spermatocytes undergo further meiotic division to form secondary spermatocytes and finally, spermatids. Spermatids later metamorphose into male gametes called spermatozoa. Sertoli cells are known as nurse cells of the testes, as they provide nourishment to the germ cells. There are large polygonal cells known as interstitial cells or leydig cells just adjacent to seminiferous tubules. These cells secrete the male hormone called testosterone.
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संबंधित प्रश्न
Humans reproduce ______.
Humans are ______.
What is the full form of IVF?
State the function of Seminal vesicle.
Multiple choice question. Tick (✓) the correct choice:
Testis are present in a sac called
- scrotum
- oviduct
- epididymis
- none of the above
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Given on the right is a diagram which represents the reproductive organs of a man:
(i) Write the names of the parts numbered 1 to 16.
(ii) Give two functions of the part 6.
(iii) Name three components of the fluid which may be found in the tube labeled 2.
(iv) What is the main function of the part labelled 3?
Given below is the outline of the male reproductive system.
(i) Name the parts labeled 1 to 5.
(ii) State the functions of the parts labeled 1 and 4.
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(iv) Why is structure 5 present outside the body in the scrotal sacs?
(v) What is semen?
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Give Technical Term:
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Find an odd one out.
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The given diagram represents T. S of
Select the MISMATCHED pair.
The enlarged end of penis is covered by a loose fold of skin is called ______.
The vas deferens receives duct from the seminal vesicle and opens into urethra as ______.
Semen is a constituent of seminal plasma with ______.
Spot the odd one out from the following structures with reference to the male reproductive system.
Seminal plasma in human males is rich in ______.
Mark the odd one.
In human males, the testes lie in the scrotum, because it helps in the
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The shared terminal duct of the reproductive and urinary system in the human male is ______.
______ carries sperms to the seminal vesicles.
Give reasons for the following
Scrotum remains outside the body of human males.
Given below is a certain situation. Analyze and describe its possible impact on a person:
Prostate and seminal vesicles are not functional.
Give reason: Testes are located outside the body cavity in scrotal sacs.
