Question

Explain the three main steps of how does the heart work.

Answer 1

we can stay without for 3 minutes

Answer 2

Answer:

1. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle through the tricuspid valve.
2. The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve.

Explanation:

Sorry I only know 2 steps

Hope it will help you