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

(i) Name the parts '1' and '5' indicated by guidelines.
(ii) What term is given to the period of development of the foetus in the womb ?
(iii) How many days does the foetus take to be fully developed ?
(iv) Mention two functions of the part labelled 2 other than its endocrine function.
(v) Name the hormone (any one) produce by the part labelled 2
(vi) What is the function of the part marked 3 ?
(b) Give the exact location of amnion.
[ICSE 2011, 2014]