Heart Anatomy Flashcards
Largest artery
Aorta
Blood enters this area via right atria, then it pumps blood to lungs
Right ventricle
Pumps blood to aorta
Left ventricle
Vena cava delivers deoxygenated blood to this area which pumps blood from body to right ventricle
Right atria
Oxygenated blood enters this area via pulmonary vein from lungs, then travels down to left ventricle
Left atria
Brings blood from upper body back to heart
Superior vena cava
Brings blood from legs back to heart
Inferior vena cava
Path of blood from body to lungs
Body to vena cava, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, lungs
Path of blood from lungs to body
Lungs to pulmonary vein, left atrium, mitral valve, left ventricle, aortic valve, aorta, body
Average lifespan of red blood cells
120 days
Blood vessel layers
Tunica intima (endothelium), tunica media (smooth muscle & elastin), tunica externa (collagen)
Tricuspid valve
between right atria & ventricle
Mitral (bicuspid) valve
between left atria & ventricle
Pulmonary valve
Between right ventricle and pulmonary artery
Aortic valve
Between left ventricle and aorta
AV (atrioventricular) valves
Tricuspid & mitral (bicuspid) valves
SL (semilunar) valves
Pulmonary & aortic valves
Systole
AV valves close to prevent backflow, SL valves open, blood flows from ventricles to pulmonary artery & aorta via ventricular contraction
Diastole
AV valves open, SL valves close, blood flows down from atria to ventricles via
Sodium/Potassium Pump
uses 1 ATP to move 2 K+ into cell and 3 Na+ out of cell
Arrhythmia
lack of regular pattern
Ectopic
out of the usual place
Focus
location
Foci
more than one focus (location)
