. The diagram given below is that of a developing human foetus in the womb

(a) Name the parts '1' to '5' indicated by guidelines.
(b) What term is given to the period of development of the foetus in the womb?
(c) How many days does the foetus take to be fully developed?
(d) Mention two functions of the parts labelled '2' other than its endocrine functions.
(e) Name (any one) hormone produced by the part labelled '2'.

Best Answer

(a) 1 - umbilical cord,
2 - placenta,
3 - amnion,
4 - mouth of uterus,
5 - muscular wall of uterus
(b) Gestation
(c) 280 days
(d) Placenta provides the foetus with oxygen and nutrients. In addition, the placenta also removes carbon dioxide and waste products of the foetus.
(e) Progesterone

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