AP BIOLOGY

Detailed explanation-1: -The valves open and close to help blood move along its path: Blood that needs oxygen flows from your body into the right atrium. It then flows through the tricuspid valve to the right ventricle. The right ventricle pumps the blood through the pulmonary valve and into your lungs, where it picks up oxygen.

Detailed explanation-2: -Heart valves control the flow of blood so that it moves in the right direction. The valves prevent blood from flowing backward. The heart has four valves. The tricuspid valve separates the right atrium and right ventricle.

Detailed explanation-3: -A check valve, also called a one-way valve, is a device that allows the flow of fluids to move only in one direction. The primary purpose of a check valve is to prevent backflow in the system. Check valves are cheap, effective, and easy solutions to a potential issue.

Detailed explanation-4: -The heart’s one-way blood flow is maintained with the help of four heart valves, each one having a specific position on the exits of the four chambers. These four heart valves allow only the one-way flow of blood in the forward directions and restrict the backward flow of blood.

Detailed explanation-5: -As the leg and arm muscles are activated (contract) the valves in the veins open to allow blood to flow back towards the heart. Each valve has two opposing flaps that act like gates opening in one direction, stopping blood from moving back down.