Bio 2 lab exam - heart and circulation guide

4 chambers

2 atria (blood enters), 2 ventricles (blood exits)

arteries

aorta - from left out to body (O2)
pulmonary arteries - from right to lungs (no O2)
coronary arteries - supply O2 blood to myocardium

veins

vena cavae - from body into right atrium (no O2)
pulmonary veins - from lungs into left atrium (O2)
coronary veins - bring no O2 blood back to right atrium

valves

mitral - between atrium and ventricle on left
tricuspid - between atrium and ventricle on right
aortic - between left ventricle and aorta
pulmonary - between right ventricle and pulmonary trunk

Chordae tendineae

hold mitral and tricuspid valve in place

layers of heart

endocardium - lines inside of hear
myocardium - thick muscle layer

epicardium - outer covering

pericardium - sack surrounding heart