Human Heart Anatomy and Function

What is the approximate size of the human heart?

• The size of a grapefruit

• The size of a tennis ball

• The size of a basketball

• The size of a fist

What is the primary function of the heart in the circulatory system?

• To filter blood

• To pump blood throughout the body

• To produce hormones

• To store oxygen

What is the role of the right atrium in the circulatory system?

• To collect deoxygenated blood from the body

• To regulate heart rate

• To send blood to the lungs

• To pump oxygenated blood to the body

Which chamber of the heart collects deoxygenated blood from the body?

• Right ventricle

• Right atrium

• Left atrium

• Left ventricle

Which chamber of the heart pumps oxygenated blood to the rest of the body?

• Left ventricle

• Left atrium

• Right atrium

• Right ventricle

What is the primary role of the right ventricle in the circulatory system?

• To collect oxygenated blood

• To pump blood to the brain

• To send deoxygenated blood to the lungs

• To regulate heart rate

Which chamber of the heart is responsible for pumping oxygenated blood to the rest of the body?

• Right atrium

• Left atrium

• Right ventricle

• Left ventricle

What is the function of the heart's valves?

• To ensure unidirectional blood flow and prevent backflow

• To produce electrical impulses

• To store blood

• To increase blood pressure

Which of the following accurately describes the cardiac cycle?

• It consists of only diastole

• It consists of diastole and systole

• It occurs only during exercise

• It is controlled by the brain

During which phase of the cardiac cycle does the heart muscle relax and the atria fill with blood?

• Ventricular contraction

• Systole

• Diastole

• Atrial contraction