Cardiac Vessels & The Cardiac Cycle

What is the primary function of cardiac vessels?

• Transport oxygenated blood to the body

• Remove waste products from the body

• Supply blood to the heart muscle

• Regulate blood pressure

The cardiac cycle consists of two main phases: systole and _______.

• Diastole

• Mitral

• Aorta

• Ventricle

Which arteries supply the heart?

• Pulmonary arteries

• Coronary arteries

• Carotid arteries

• Femoral arteries

The Right Coronary Artery (RCA) supplies the right atrium, right ventricle, and parts of the ________.

• left atrium

• left ventricle

• aorta

• pulmonary trunk

What are the two main phases of the cardiac cycle?

• Systole and Diastole

• Contraction and Relaxation

• Atria and Ventricles

• Ejection and Filling

During diastole, the ventricles ______ and blood fills the ventricles.

• contract

• relax

• eject

• pump

What happens during systole?

• A) Ventricles relax

• B) Atria contract

• C) Ventricles contract, ejecting blood into the aorta and pulmonary artery

• D) Blood fills the ventricles.

The cardiac cycle is regulated by electrical signals from which node?

• A) Atrioventricular (AV) node

• B) Sinoatrial (SA) node

• C) Bundle of His

• D) Purkinje fibers

What is the role of the SA node in the heart?

• It acts as the heart's pacemaker, initiating the heartbeat.

• It triggers ventricular contraction.

• It moves the impulse to the AV node.

• It is part of the Purkinje fibers.

The electrical impulse travels to the ________ node.

• SA

• AV

• Purkinje

• His