Question

which is the most impotant muscle in circulatory system?​

Answer 1

Answer:

The heart

Explanation:

The heart is a hollow, muscular organ about the size of a fist. It is responsible for pumping blood through the blood vessels by repeated, rhythmic contractions.

Answer 2

Answer:

The heart is a hollow, muscular organ about the size of a fist. It is responsible for pumping blood through the blood vessels by repeated, rhythmic contractions.

The heart is a muscle. The muscle is a modified form of skeletal muscle called cardiac muscle. The muscle cells are composed of individual filaments.