Heart Structure | MCQs

Explanation

The heart consists of four chambers in which blood flows.

Blood enters the right atrium and passes through the right ventricle.

The right ventricle pumps the blood to the lungs where it becomes oxygenated.

Explanation

The septum is the muscular wall that separates the right and left sides of the human heart.

It prevents the mixing of oxygenated and deoxygenated blood between the two sides.

Explanation

On the right side of the heart, the right atrium and ventricle work to pump oxygen-poor blood to the lungs.

On the left side, the left atrium and ventricle combine to pump oxygenated blood to the body.

The heart consists of four chambers in which blood flows.

Blood enters the right atrium and passes through the right ventricle.

The right ventricle pumps the blood to the lungs where it becomes oxygenated.

Explanation

The right ventricle is responsible for pumping deoxygenated blood to the lungs.

While the right atrium receives blood from the vena cava, it only needs to passively push that blood into the right ventricle.

The right ventricle, however, needs to generate significant force to propel the blood through the pulmonary artery to the lungs.

This requires a thicker, more muscular wall. 

Explanation

The right ventricle pumps the blood to the lungs where it becomes oxygenated. 

The heart is a pump, usually beating about 60 to 100 times per minute.

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Explanation

Endocardium lines the inner chambers of the heart.

Myocardium is the thick, muscular middle layer responsible for contraction.

Epicardium is the outermost protective layer.

Together, these three layers make up the complete structure of the heart wall.

Explanation

Explanation

• In the smooth glistening internal layer of the heart in which blood flow is called the Endocardium
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• The inner layer of the Heart wall is called Endocardium.
• The endocardium is a thin, smooth tissue that makes up the lining of the chambers and valves of the heart.
• The innermost layer of the heart's walls, it serves as a barrier between cardiac muscles and the bloodstream and contains necessary blood vessels
  

Explanation