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प्रश्न
Give Reasons
At the time of birth, the testes descend into the scrotal sacs.
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उत्तर
In human beings (mammals) the temperature required for the production and survival of sperms is lower than that of the body temperature. Hence, to provide a suitable temperature of about 2 – 3°C lower than that of body temperature, the testes descend into the scrotal sec at the time of birth.
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संबंधित प्रश्न
Describe the function of placenta.
How many pairs of chromosomes are present in human beings? Out of these how many are sex chromosomes?
Why are testes located outside the abdominal cavity? What is responsible for bringing about changes in appearance seen in boys at the time of puberty?
Name the liquid that contains sperms.
The diagram below represents two reproductive cells A and B. Study the same and then answer the questions that follow:
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- Identify the reproductive cells A and B.
- Name the specific part of the reproductive system where the above cells are produced.
- Where in the female reproductive system do these cells unite?
- Name the main hormones secreted by the (1) ovary (2) testes.
- Name an accessory gland found in the male reproductive system and state the function of its secretion.
Give appropriate term of the following:
The onset of reproductive phase in a young female.
Choose the correct answer:
When pregnancy does not occur, the life of corpus luteum is about _____________
Give the function of the following:
Uterus
Differentiate on the basis of what is indicated in brackets :
The prostate gland and Cowper’s gland (the nature of secretion)
Reproductive organs are also considered endocrine glands.
