asked 168k views
15 votes
Heart sounds are caused by

A
contraction of the heart muscle
B
relaxation of the heart muscle
С
closing of the heart valves
D
movement of blood through the body

2 Answers

12 votes
It’s A

I hope this helps
answered
User Gary Wisniewski
by
8.7k points
6 votes
Contraction of the heart muscle
answered
User Saransh Malik
by
8.7k points
Welcome to Qamnty — a place to ask, share, and grow together. Join our community and get real answers from real people.