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प्रश्न
State its functions in case of a pregnant human female.
उत्तर
Functions of the placenta:
- It provides food and oxygen to the foetus.
- The foetus gives away waste products and carbon dioxide to the mother’s blood for excretion.
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संबंधित प्रश्न
Find the odd one out and write it: vagina, uterus, vas deferens, ovary
Suggest three contraceptive methods to control the size of human population, which is essential for the health and prosperity of a country. State the basic principle involved in each.
What could be the reasons for adopting contraceptive methods?
Give scientific reasons: When an ovum gets fertilized, menstrual cycle stops temporarily in a woman.
The germ cell A produced by a person X is round in shape and it fuses with another germ cell B having a long tail and produced by a person Y. The fusion of A and B produces a new cell C. The cell C divides repeatedly and grows inside the organ D of person X to form E in which the body features of the unborn baby are not much developed. E grows further to form F in which the various body features of the unborn baby (like hands, legs, head, eyes, and ears, etc.) can be identified. F grows further and ultimately forms a baby. What are A, B, C, D, E and F? Out of the two persons X and Y, which one is male and which one female?
The vagina is a muscular tube.
Define the following:
Implantation
Differentiate
Sexual Reproduction and Asexual Reproduction.
State the Location:
Uterus
How does human sperm locomote?
