Human Circulatory System - Heart

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Questions and Answers

What function does the left ventricle serve in the circulatory system?

It pumps oxygenated blood to the aorta for distribution. (correct)
It receives oxygenated blood from the lungs.
It pumps deoxygenated blood to the lungs for oxygenation.
It collects deoxygenated blood from the body's tissues.

Which statement accurately describes the flow of blood through the heart?

Oxygenated blood flows directly from the right atrium to the lungs.
The left atrium pumps blood to the body via the pulmonary artery.
Deoxygenated blood enters the left ventricle before going to the aorta.
The right side of the heart receives deoxygenated blood from the vena cavae. (correct)

What is the primary role of the pulmonary veins in the circulatory process?

To transport oxygenated blood from the lungs to the left atrium. (correct)
To receive blood from the aorta before it reaches systemic circulation.
To pump oxygenated blood to the carotid artery.
To carry deoxygenated blood from the body to the heart.

Which description correctly identifies a characteristic of cardiac muscle?

<p>It is a muscular tissue that contracts and relaxes rhythmically. (A)</p> Signup and view all the answers

Why is the left ventricle considered the most muscular chamber of the heart?

<p>It pumps oxygenated blood to the entire body against higher pressure. (D)</p> Signup and view all the answers

Flashcards

What is the heart's main function?

The heart is a strong muscle that rhythmically contracts and relaxes, pumping blood throughout the body.

What type of muscle makes up the heart?

Cardiac muscle is a specialized type of muscle found only in the heart. It's responsible for the heart's tireless pumping.

What are the upper chambers of the heart called?

The upper chambers of the heart are called atria. They receive blood coming back to the heart.

What are the lower chambers of the heart called?

The lower chambers of the heart are called ventricles. They pump blood out of the heart to the body and lungs.

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Why is the human circulatory system called a 'double circulation'?

Humans have a double circulation system, meaning blood passes through the heart twice during one complete cycle. This ensures efficient oxygen delivery to the body.

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Study Notes

Human Circulatory System - Heart

The heart is a muscle that contracts and relaxes to pump blood throughout the body.
The heart has four chambers: two atria and two ventricles.
The upper chambers are called atria.
The lower chambers are called ventricles.
The right side of the heart receives deoxygenated blood from the vena cava.
The left side of the heart pumps oxygenated blood to the body via the aorta.
Blood flows through the heart twice in one circuit, making it double circulation.
Deoxygenated blood is sent to the lungs via the pulmonary artery to pick up oxygen.
Oxygenated blood is sent back to the heart via the pulmonary vein
The left atrium receives oxygenated blood.
The left ventricle pumps the oxygenated blood to the rest of the body
The left ventricle is the most muscular chamber due to its role in pumping blood.