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प्रश्न
The structure formed by the villi of the embryo and the uterus of the mother.
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उत्तर
Placenta
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संबंधित प्रश्न
Where does a fertilised ovum develop into a baby in the human body?
Fill in the following blank with suitable word :
The menstrual cycle is controlled by.............
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?
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?
Draw a sectional view of human female reproductive system and label the following parts :
(i) Where the development of egg occurs.
(ii) Where fertilization takes place.
Describe in brief the role of testis in human male reproductive system.
Name the organs of the human male reproductive system and state the functions of any two organs.
Give two important unique features of the human reproductive system.
Choose the Odd One Out:
How does human sperm locomote?
