The heart.
Smooth muscle tissues can relax and contract. Additionally, cardiac muscle tissues also have the ability to relax and contract. Skeletal muscle tissues are another type that can relax and contract voluntarily.
i don't no what is the answer?
The organ system composed of tissue that can contract and relax is muscle tissue.
relax
Achalasia
cardiac
Such a painful muscle contraction is commonly known as cramp.
Spasm
What muscle doesnt get used?
Relax
Tetany
relax