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प्रश्न
Given below is a diagram of the lateral section of the testis of a man. Study the same and answer the questions that follow:
(i) Label the parts numbered 1 to 4 of the diagram.
(ii) State the functions of the parts labeled 1 and 3.
(iii)What is the significance of the testes being located in the scrotal sac outside the abdomen?
(vi)What is the role played by the inguinal canal?
(v) What is semen?
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उत्तर
(i)
1. Seminiferous tubules
2. Testicular lobule
3. Epididymis
4. Vas deferens
(ii)
1. Seminiferous tubules: sperm production, nourishment, and protection of sperm.
3. Epididymis: stores sperm, contributes to seminal fluid.
(iii) The scrotal sac acts as a thermoregulator. The temperature in the scrotal sac remains 2-3°C lower than the body temperature which is suitable for the maturation of sperm.
(iv) Through the inguinal canal, the sperm duct is connected and so passes the sperm to the urinary bladder.
(v) Semen is a mixture of mature sperm and secretions of’ various accessory glands. It is a milky fluid.
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संबंधित प्रश्न
Why is it important that a very large number of sperms should be present in the semen ?
Fill in the blank:
Male gemetes are produced inside _______.
Complete the following sentences with appropriate word:
The surgical sterilization of males is known as _________.
Identify the approximate number of lobules present in the testis.
Along the path of the vas-deferens the secretions of which gland provide nutrition to the sperms?
Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.
Crypts of Lieberkuhn are absent in ______.
Explain the function of the following structure in the human male reproductive system.
Scrotum
The figure given below is an important gonad of humans. Study the figure and answer the following questions.
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- Identify the organ. Write its specific location in the body.
- Label the parts shown in the figure as 1 to 4.
- Write important functions of parts 2 and 4.
- Name one cellular structure and one hormone which are produced in part 3.
- Draw a neat and labelled diagram of the cellular structure mentioned by you in (d).
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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