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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
Differentiate between Human skin cell and Human ovum (number of chromosomes).
Sketch the labeled diagram:
Human male reproductive system
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?
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.
(iii) Name the cells of part 5 that produce testosterone.
(iv) Why is structure 5 present outside the body in the scrotal sacs?
(v) What is semen?
All are accessory ducts in males, EXCEPT
Fructose is found in secretion of ______.
Semen is a constituent of seminal plasma with ______.
Give two reasons for the appearance of variations among the progeny formed by sexual reproduction.
Write briefly about the Testis.
Give reason: Testes are located outside the body cavity in scrotal sacs.
