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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 surface by two types of cells: spermatogonia and Sertoli cells. Spermatogonia are male germ cells that give rise to primary spermatocytes through 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 the seminiferous tubules. These cells secrete the male hormone called testosterone.
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संबंधित प्रश्न
Humans are ______.
Describe the human male reproductive system.
State the reason why testes lie outside the abdomen in a scrotum?
Name the following:
The tubular knot fitting like a cap on the upper side of the testis.
Write important function of the following:
Inguinal canal
What are the accessory reproductive organs?
With the help of labelled diagramms describe the structures of human sperm and unfertilized ovum.
A couple is unable to conceive. Which modern techniques are available to overcome this problem?
Explain the term Vasectomy.
Name the Following
The structure in which testes are present in man.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Cowper’s gland opens into the urethra.
Write the functional activity of the following structure:
Seminiferous tubules
State names of organs in male reproductive system.
Write the answers to the questions by observing the figure.
- What does the above figure show?
- Write the names of parts A, B, C, D.
- Write the function of the part 'D'.
- How is semen formed?
Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.
Identify the primary sex organs in males.
lf vasectomized man attempts to rape, then the presence of which of the following confirms it?
In humans, male germs cells differentiate into ______ at the end of first meiotic division.
Urethral meatus refers to the ______.
Increased secretion of which hormone start the process of sperm formation at the time of puberty?
In human males, the testes lie in the scrotum, because it helps in the
Which one of the following is not a male accessory gland?
Which of the following provides a proof for forensic test in case of rape?
Give reason: Testes are located outside the body cavity in scrotal sacs.
Choose the odd one out from the group of terms given below and write the category for the remaining terms:
Given below is the outline of the male reproductive system. Name the parts labelled 1 to 8. Also name the corresponding structure of part (4) in female reproductive system.
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Which accessory ducts are responsible for sperm transport and maturation in their correct sequence?
The scrotum maintains a temperature how much lower than normal body temperature?
The vas deferens is described as which type of duct?
The penis is composed of which type of tissue that enables erection during insemination?
What is the enlarged tip of the penis called?
