Question

The diagram given below is that of a developing human foetus in the womb. Study the same and then answer the questions that follow:

1. Name the parts ‘l’ to ‘5’ indicated by guidelines.
2. What term is given to the period of development of the foetus in the womb?
3. How many days does the foetus take to be fully developed?
4. Mention two functions of the parts labelled ‘2’ other than its endocrine function.
5. Name any one hormone produced by the part labelled ‘2’.

Answer 1

(a) Parts labelled 1 to 5:

1. Umbilical cord
2. Placenta
3. Amnion
4. Mouth of uterus (cervix)
5. Muscular wall of uterus

(b) The period of development of the foetus in the womb is called gestation.

(c) The foetus takes about 280 days to become fully developed.

(d) Two functions of the placenta other than its endocrine function are: it supplies oxygen and nutrients to the foetus and removes carbon dioxide and metabolic wastes from the foetus.

(e) One hormone produced by the placenta is progesterone.