heart anatomy

pericardium/pericardial sac

layer of THREE membranes surrounding heart for protection

atria

upper chambers of the heart to increase volume

ventricles

lower chambers of the heart that force blood out of the heart and into arteries

auricles

anterior extension of atria to increase volume

vena cava

returns deoxygenated blood from tissues to heart

tricuspid valve

between right atrium and ventricle; moves blood from atrium and ventricle

pulmonary valve

between right ventricle —> pulmonary arteries —> lungs; prevents blood from pulmonary trunk to enter right ventricle

mitral valve

moves blood from left atrium to left ventricle

aortic valve

prevents blood from aorta to enter left ventricle

aorta

sends oxygenated blood throughout the body

flow of blood