ANATOMY

GENERAL ANATOMY

CARDIOVASCULAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How does the heart work?
A
It pumps blood first to the lungs, back to the heart and then around the rest of the body.
B
It pumps blood first to the rest of the body, back to the lungs and then to the heart.
C
It pumps blood around the rest of the body, back to the heart and then to the lungs,
Explanation: 

Detailed explanation-1: -The right ventricle pumps the low-oxygen blood to the lungs to pick up a fresh supply of oxygen. The left atrium receives to high-oxygen blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the high-oxygen blood to the rest of the body.

Detailed explanation-2: -The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide. The blood then returns to the heart through the pulmonary veins.

Detailed explanation-3: -Blood is pumped through the valves into the ventricles. Where the atria meet the ventricles, there is an area of special cells-called the atrio-ventricular node-which pass the electrical signals throughout your heart muscle by a system of electrical pathways, known as the conducting system.

Detailed explanation-4: -The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide. The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body.

Detailed explanation-5: -The main pump is inserted into the tip of the heart. The blood is pumped out through a flexible plastic tube to the body’s main artery (aorta). The aorta sends blood to the rest of the body. A cord inserted through the skin connects the mechanical pump to a control unit (controller) and battery pack outside your body.

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