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The Septum refers to the walls that separate the right and left sides of the heart, preventing oxygen-rich and oxygen-poor blood from mixing.

Platelets form clots to stop bleeding and are essential in the body's ability to repair damaged blood vessels.

The Pericardium is a double-walled sac that contains the heart and the roots of the great vessels.

The Vena Cava are the two largest veins in the body that carry deoxygenated blood into the right atrium of the heart from the systemic circulation.

The Myocardium is the muscular layer of the heart wall responsible for the pumping action.

Red Blood Cells carry oxygen from the lungs to the body's tissues and take carbon dioxide back to the lungs to be expelled.

Blood Plasma is the liquid component of blood that carries cells and proteins throughout the body.

The Lymphatic System returns interstitial fluid to the blood, maintains fluid balance, and is involved in immune responses.

An ECG is a recording of the electrical activity of the heart over a period of time, used to diagnose heart abnormalities.

Capillaries are the site of exchange of gases, nutrients, and waste products between blood and tissues.

The Atrioventricular Node relays electrical signals from the atria to the ventricles, creating a delay to ensure proper timing of contractions.

The Sinoatrial Node generates electrical impulses that set the rhythm for the heart, acting as the natural pacemaker.

The Endocardium lines the inside of the heart's chambers and valves, made up of a layer of endothelial cells.

The Aorta is the main artery that carries oxygenated blood from the left ventricle to the rest of the body.

Pulmonary Veins carry oxygenated blood from the lungs to the left atrium of the heart.

Veins carry deoxygenated blood towards the heart from the tissues, except for the pulmonary veins.

Coronary Arteries supply oxygen-rich blood to the myocardium, the muscular tissue of the heart.

Coronary Veins remove deoxygenated blood from the myocardium, returning it to the right atrium.

Papillary Muscles attach to the cusps of the atrioventricular valves via the chordae tendineae and contract to prevent inversion of these valves.

The heart pumps blood throughout the body, dealing with both the systemic and pulmonary circulation.

Arteries carry oxygenated blood away from the heart to the body tissues, except for the pulmonary arteries.

The Tricuspid Valve prevents backflow of blood from the right ventricle to the right atrium during ventricular contraction.

Pulmonary Arteries carry deoxygenated blood from the right ventricle to the lungs for oxygenation.

The Bicuspid Valve, also known as the Mitral Valve, prevents backflow of blood from the left ventricle to the left atrium.

The Pulmonary Valve prevents backflow of blood from the pulmonary artery to the right ventricle after contraction.

The Conducting System controls the heartbeat, consisting of the sinoatrial node, atrioventricular node, bundle of His, bundle branches, and Purkinje fibers.

White Blood Cells are involved in protecting the body against infectious disease and foreign invaders.

The Epicardium is the outermost layer of the heart wall and functions as a protective layer.

The Aortic Valve prevents backflow of blood from the aorta into the left ventricle after contraction.