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प्रश्न
What are the signs of puberty in human males and females?
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उत्तर
In a boy: Change of voice and discharge of semen.
In a girl: Appearance of the menses, the appearance of mammary glands, and widening of the hips.
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संबंधित प्रश्न
Name the human male reproductive organ that produces sperms and also secretes a hormone. Write the functions of the secreted hormone.
Name the respective part of human female reproductive system:-
(i) that produces eggs,
(ii) where fusion of eggs and sperm takes place, and
(iii) where zygote gets implanted.
Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria
Do all organisms give birth to individuals like humans?
Name the liquid that contains sperms.
What is puberty? Who attains puberty at an earlier age in human beings : male or female (boy or girl)?
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.
When a human female reaches a certain age then vaginal bleeding occurs for a few days after regular time intervals.
(a) What is this process known as (i) in scientific terms, and (ii) in everyday language?
(b) At what approximate age this process starts in human females? When is the human female said to have attained at this stage?
(c) After how much time is this process repeated? For how many days does this process usually last?
(d) What does the onset of this process in human females signify?
(e) At which particular event in the life of a human female does this process stop temporarily but start again?
(f) At which approximate age of human female does this process stop permanently?
Choose the correct answer:
Fertilization occurs in _____________
Name the following:
Male and Female organs on specific individuals.
