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प्रश्न
Define the following:
Gestation
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उत्तर
Gestation: The period in which an embryo develops in the uterus is called gestation.
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संबंधित प्रश्न
Draw a sectional view of human female reproductive system and label the part where
(i) eggs develop.
(ii) fertilisation takes place.
(iii) fertilised egg gets implanted.
State its functions in case of a pregnant human female.
Give biological explanations for All the food chains begin with green plants.
What are the organs in humans which produce the gametes?
What are the male sex cells in humans called?
Write the names of male sex hormone?
What is the scientific name of birth canal?
When a fertilised egg E formed in the oviduct of a human female divides repeatedly to form an embryo, the embryo gets implanted in the thick and soft lining of the uterus. After this a disc-like special tissue T develops between the uterus wall and embryo through which all the requirements of the developing embryo (and foetus) are met from the mother's body, The embryo is connected to the tissue T through a string like structure S.
(a) What is the other name of fertilised egg cell E?
(b) What is the name of tissue T?
(c) Name the string-like structure S.
(d) Name two substances which pass from mother's blood to embryo through tissue T and, one type of substance which passes from embryo to mother's blood.
(e) What happens to S when the baby is born? Why?
Write two examples of sexually transmitted diseases caused by virus.
Rewrite the following terms in a correct and logical sequence:
The luteal phase, follicular phase, menstrual phase, ovulatory phase.
