Question

which muscles shows continuous expansion and relaxation ​

Answer 1

cardiac muscle always show continous expansion and relaxtion

Answer 2

In the human body, there are various examples of it.

Some of them are:

1. In the heart, the cardiac muscles constantly contract and relax to pump blood to or body.
2. While swallowing food, the oesophagus muscles also constantly contract and relax causing peristaltic movement the makes the food travel from mouth to the stomach.