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Heart Anatomy and Function

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Questions and Answers

What is the approximate size of the human heart?

The size of a closed fist (correct)

The size of a watermelon

The size of a tennis ball

The size of a basketball

In humans, how many chambers is the heart divided into?

Three chambers

Two chambers

Four chambers (correct)

Five chambers

What prevents backflow of blood in a healthy heart?

Pericardium

Myocardium

Heart valves (correct)

Pacemaker cells

What is the protective sac around the heart called?

Pericardium Signup and view all the answers

Where is the sinoatrial node located?

Right atrium Signup and view all the answers

What is the role of the heart in the circulatory system?

Carrying nutrients to the body Signup and view all the answers

What is the function of the pericardium?

Enclosing and protecting the heart Signup and view all the answers

What are the three layers that make up the wall of the heart?

Epicardium, myocardium, endocardium Signup and view all the answers

What causes the asymmetric orientation of the heart in all vertebrates?

Developmental axial twist in the early embryo Signup and view all the answers

What determines the rhythm of blood pumping by the heart?

Pacemaker cells in the sinoatrial node Signup and view all the answers