Covering of heart is called

The covering of egg is called ........ membrane.

Outer covering of kidney is called as

The contraction of heart is called ........... while the relaxation of heart is called …………… .

Fill in the blanks: The contraction of heart is called......while the relaxation of heart is called...... .

Relaxation of chembers of heart is called _____.

Relaxation of heart is called systole/diastole.