Question

What is the definition of a heart contraction? Is it when the heart relaxes or when it squeezes and pushes the blood from one place to another?

Answer 1

When it pushes the blood out.

Explanation:

Think about this question logically if you ever have to think about it again and are confused. If something contracts it is getting smaller and/or tighter. If the heart is squeezing and making itself smaller it is pushing blood out of it and throughout the body.