The diagram given below is that of a developing human foetus. Answer the questions that follow: The diagram given below is that of a developing human foetus. Answer the questions that follow:
Explain the significance of the part numbered 3 in the diagram.
Topic: Significance of amniotic fluid
Answer
The AMNIOTIC FLUID acts as a SHOCK ABSORBER, cushioning the foetus against jerks and blows from outside. It maintains a CONSTANT TEMPERATURE, keeps the foetus moist and prevents its delicate tissues from sticking to the amnion, and allows it to MOVE FREELY, which is necessary for the proper development of its muscles and bones.
Give at least TWO functions, since the question says "explain the significance" rather than asking for one.
The protective role is obvious; the TEMPERATURE and FREE MOVEMENT roles are the ones candidates forget, and the movement point is the most interesting — a foetus that could not move would not develop its muscles and joints properly.
Its escape when the sac ruptures — "the breaking of the waters" — is one of the signs that labour has begun.