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The body's largest artery that carries oxygenated blood from the heart to the rest of the body.

The phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries.

A valve in the heart that allows blood to flow from the left atrium to the left ventricle, but not in the reverse direction.

A large vein carrying deoxygenated blood into the heart; divided into superior and inferior.

Heart muscle tissue that is responsible for the pumping action of the heart.

Platelets, blood cells that are responsible for blood clotting.

A part of the electrical control system of the heart that coordinates the top of the heart. It electrically connects atrial and ventricular chambers.

A vein that carries oxygenated blood from the lungs to the left atrium of the heart.

The artery that carries deoxygenated blood from the right ventricle to the lungs for oxygenation.

The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.

The arteries that supply oxygen-rich blood to the myocardium or heart muscle.

The liquid component of blood that carries the blood cells and nutrients and is involved in waste removal and immune system functions.

Red blood cells which carry oxygen from the lungs to the rest of the body and return carbon dioxide from the body to the lungs.

The pacemaker of the heart, located in the right atrium, it initiates the heartbeat and controls the heart rate.

White blood cells that are part of the immune system and defend the body against both infectious disease and foreign materials.

A complete heartbeat from its generation to the beginning of the next beat, and it includes the diastole, the systole, and the intervening pause.

Refers to the effects that affect heart rate.

A test that measures the electrical activity of the heartbeat to show whether or not it is working normally.

The fibrous sac that surrounds the heart and roots of the great vessels, providing support and protection.

The innermost layer of tissue that lines the chambers of the heart. Its cells are smooth to prevent blood from clotting.

A condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly.

The number of heart beats per minute, reflecting the speed of the heartbeat.

The volume of blood being pumped by the heart in a minute, calculated by the formula $\text{CO} = \text{SV} \times \text{HR}$, where CO is cardiac output, SV is stroke volume, and HR is heart rate.

The amount of blood pumped by the left ventricle of the heart in one contraction.