EVERYDAY SCIENCE

SCIENCE

CIRCULATORY SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the last step in the pathway of blood through heart?
A
atria contract
B
ventricles contract
C
valves between the ventricles and vessels shut
D
valves between atria and ventricles shut
Explanation: 

Detailed explanation-1: -Your mitral valve opens to send blood from your left atrium to your left ventricle. When your left ventricle is full it squeezes, which closes your mitral valve and opens your aortic valve. Your heart sends blood through your aortic valve to your aorta, where it flows to the rest of your body.

Detailed explanation-2: -Blood comes into the right atrium from the body, moves into the right ventricle and is pushed into the pulmonary arteries in the lungs. After picking up oxygen, the blood travels back to the heart through the pulmonary veins into the left atrium, to the left ventricle and out to the body’s tissues through the aorta.

Detailed explanation-3: -Blood flows from the left atrium into the left ventricle through the open mitral valve. When the ventricle is full, the mitral valve shuts to prevent blood from flowing backwards into the atrium. Blood leaves the heart through the aortic valve into the aorta and to the rest of the body.

Detailed explanation-4: -Deoxygenated blood starts to run from the body. It flows into Superior/ Inferior Vena Cava. The flow of deoxygenated blood reaches the right atrium. The atrium will push the flow through the Tricuspid valve. The gore stays in the right ventricle. More items •30-Mar-2022

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