Heart Structure

BMA1012

Aorta

Takes oxygenated blood to body

Chordae tendineae

Anchor AV valves to papillary muscle

Coronary sinus

Returns deoxygenated blood from coronary circulation to right atrium

Inferior vena cava

Returns deoxygenated blood from lower half of body to right atrium

Left semilunar (aortic) valve

Prevents backflow of blood from aorta into left ventricle

Left and right pulmonary arteries (×2)

Divisions of the pulmonary trunk – take blood to lungs

Left and right pulmonary veins (×4)

Return oxygenated blood from lungs to left atrium

Left atrioventricular (bicuspid/mitral) valve

Prevents backflow of blood from left ventricle to left atrium

Left atrium

Receiving chamber for deoxygenated blood

Left ventricle

Discharging chamber for oxygenated blood – sends to systemic circulation

Papillary muscle

Contracts to prevent AV valves opening into atria

Pulmonary trunk

Major artery taking deoxygenated blood to lungs

Right semilunar (pulmonary) valve

Prevents backflow of blood from pulmonary trunk into right ventricle

Right and left coronary arteries

Take oxygenated blood to cardiac tissue

Right atrioventricular (tricuspid) valve

Prevents backflow of blood from right ventricle to right atrium

Right atrium

Receiving chamber for oxygenated blood

Right ventricle

Discharging chamber for deoxygenated blood – sends to pulmonary circulation

Superior vena cava

Returns deoxygenated blood from upper half of body to right atrium