Answer :
1. pump blood into the pulmonary trunk from the right ventricle and into the aorta from the left ventricle
2. it occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body.
3. incorrect question
2. it occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body.
3. incorrect question