Question

Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.
Example : Oxygen : Inspiration : : Carbon dioxide : Expiration
Foetus : Amnion : : Heart : ___________.

Answer 1

The amnion or the amniotic sac is a thin membrane that closely covers the developing embryo until shortly before birth. It is necessary to protect the embryo during pregnancy.

In case of the heart, a double walled conical sac of fibrous tissues that surrounds the heart and the roots of great blood vessels is called the pericardium.

So, the answer is- Foetus : Amnion :: Heart : Pericardium