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प्रश्न
Give biological explanations for The placenta is an important structure for the development of a foetus
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उत्तर
The placenta allows diffusion of food and oxygen from mother to foetus and that of nitrogenous waste and CO2 from foetus to mother
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संबंधित प्रश्न
List two functions ovary of human female reproductive system.
Write the site of fertilization and the part where the zygote gets implanted in the human female.
What are the different methods of contraception?
State the changes that take place in the uterus when Implantation of embryo has occurred
In a flower, the parts that produce male and female gametes are respectively :
(a) sepal and anther
(b) filament and stigma
(c) anther and ovary
(d) stamen and style
X and Y are two human beings. The organ A in the reproductive system of X releases a mature gamete B once a month which goes into a tube-like structure C through a funnel-like opening. The organ D in the reproductive system of Y makes and releases gametes E which pass through a duct F and are introduced by an organ of Y, into the body of X. B and E fuse together in C to form a new cell G. The cell G divides repeatedly to form a ball of cells H which gets embedded in the lining of organ I of reproductive system of X where it grows and develops into a baby.
(a) Name (i) organ A, and (ii) gamete B.
(b) Write two names of tube-like structure C.
(c) Name (i) organ D, and (ii) gamete E.
(d) Write two names of duct F.
(e) Name (i) cell G (ii) ball of cells H, and (iii) organ I.
(f) Out of X and Y, which one is (i) male, and (ii) female?
What is reproduction? List its two types.
Multiple Choice Question:
What will happen if the temperature of the scrotal sacs temporarily goes to about 2°C lower than body temperature?
What is inhibin?
