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प्रश्न
List and explain in brief three methods of contraception.
उत्तर
Contraceptive methods are used to avoid pregnancy. The three methods are
(i) Mechanical barrier: Condoms on the penis or similar coverings worn in the vagina can serve this purpose. These barriers do not allow sperms to reach the egg.
(ii) Use of contraceptive pills: The contraceptive pills prevent the release of and fertilisation cannot occur.
(iii) Contraceptive devices: In this method, loop or the copper-T are placed in the uterus to prevent pregnancy.
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संबंधित प्रश्न
Write the functions of the following parts in human female reproductive system:-
(i) Ovary
(ii) Oviduct
(iii) Uterus
What are the different methods of contraception?
The diagram shown below is the longitudinal section of a testis of man. Study it carefully and answer the questions that follow
(i) Label the parts numbered 1 to 3 in the diagram.
(ii) In which part of the testis are the sperms produced?
(iii) State the functions of the parts labelled 1 and 3 in the diagram.
Give scientific reasons: When an ovum gets fertilized, menstrual cycle stops temporarily in a woman.
What is puberty? Who attains puberty at an earlier age in human beings : male or female (boy or girl)?
What is gestation period? How much is the gestation period in humans?
Which one of the following best describes the function of the umbilical cord? It :
(a) feeds the embryo with digested substances.
(b) conveys nutrients and wastes to and from the embryo respectively
(c) removes waste matter from the embryo to the mother's blood.
(d) supplies oxygenated blood from the mother to the embryo.
In humans, the fertilization takes place in:
Identify the given diagram.
Name the parts 1 to 5. 
Arrange and rewrite the terms in the group in the correct order to be in a logical sequence beginning with the term that is underlined:
Testis, Urethra, Sperm duct, epididymis.
