Heart Anatomy

Which of the following best describes how blood moves through the heart chambers during diastole?

• Blood is pushed from the atria to the ventricles.

• Blood is pushed from the ventricles to the atria.

• Blood is drawn into the ventricles due to a falling pressure within the ventricles.

• Blood is pushed out of the heart into the arteries.

In a healthy heart, approximately what percentage of ventricular blood volume is provided during early diastole?

• 15-35%

• 65-85%

• 40-60%

• 90-100%

Which layer of the heart is the outermost layer?

• Myocardium

• Endocardium

• Epicardium

• Pericardium

What is the function of the aortic valve?

• To prevent blood from flowing back into the left atrium

• To prevent blood from flowing back into the right atrium

• To prevent blood from flowing back into the left ventricle

• To prevent blood from flowing back into the right ventricle

Which structure carries deoxygenated blood from the body to the heart?

• Aorta

• Pulmonary veins

• Superior vena cava

• Left pulmonary artery

What is the final step in the cardiac cycle before blood returns to the heart?

• Blood fills the atria

• Blood enters ventricles

• Blood flows through AV valves

• Blood exits the heart

Which circulation is responsible for supplying blood to the body in the cardiac cycle?

• Pulmonary circulation

• Systemic circulation

• Coronary circulation

• Lymphatic circulation

Which part of the cardiac cycle involves high pressure?

• Blood fills the atria

• Blood flows through AV valves

• Blood enters ventricles

• Blood returns to the heart

Which part of the cardiac cycle involves the heart receiving deoxygenated blood?

• Systemic circulation

• Pulmonary circulation

• Coronary circulation

• Lymphatic circulation

What is the definition of the Cardiac Cycle?

• the contraction of the atria

• the sequence of events that occur during one complete heartbeat

• the contraction and relaxation of the ventricles

• the circulation of blood in the heart