AP BIOLOGY

ANIMAL PHYSIOLOGY

HUMAN CIRCULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ are structures that close to prevent blood from going backwards.
A
ventricles
B
valves
C
veins
D
arteries
Explanation: 

Detailed explanation-1: -The pulmonary valve prevents blood from going backward from the pulmonary artery to the right ventricle. Mitral valve: This valve has two leaflets. They allow blood to flow from the lungs into the left atrium. And they prevent backward flow from the left ventricle to the left atrium.

Detailed explanation-2: -Heart valves The valves prevent blood from flowing backward. The heart has four valves. The tricuspid valve separates the right atrium and right ventricle. The mitral valve separates the left atrium and left ventricle.

Detailed explanation-3: -The aortic and pulmonic valves close, preventing backward blood flow into the heart.

There is 1 question to complete.