Chapter 7:8 - Parts of the Heart

Upper chambers

Atria

Lower chambers

Ventricles

Thin Walls

Atria

Thicker Walls (but not Thickest)

Right Ventricle

Thickest walls

Left ventricle

Wall between left and right

Septum

Sac around the heart

Pericardium

Thick muscle layer

Myocardium

Smooth inner lining

Endocardium

Outer layer of the heart wall

Epicardium

Valve between right atrium and right ventricle

Tricuspid valve

Valve between left atrium and left ventricle

Mitral (bicuspid) valve

Valve between left ventricle and aorta

Aortic valve

Valve between right ventricle and pulmonary artery

Pulmonary valve

Job of every valve

Stop backflow

Largest artery

Aorta

Blood from above the heart

Superior vena cava

Blood from below the heart

Inferior vena cava

Feed the heart muscle

Coronary arteries