Part 1 Flashcards
(22 cards)
Endocardium
Smooth layer
Lines the interior
Valves are made from this layer
Layers of the Heart
Endocardium, Myocardium, Epicardium
Myocardium
Muscle layer
Thickest layer
Epicardium
Thin, outermost layer
Joins with serious lining outside the heart to form the Pericardium
Septum
Seperates the left and right heart
Septum - Interatrial
top part of the septum
Septum - Interventricular
bottom part of the septum
The Four Chambers
Right Atrium
Right Ventricle
Left Atrium
Left Ventricle
Right Atrium
recieves blood from the superior and inferior vena cava
Right Ventricle
pumps blood to the lungs
Left Atrium
receives oxygenated blood from the lungs
Left Ventricle
pumps oxygenated blood to the rest of the body, strongest chamber
Valves
important to control the flow of blood from one chamber of the heart to another
allow blood to flow in only one direction
Tricuspid valve
Location
opening between right atria and right ventricle
Pulmonary semilunar valve
Location
opening between right ventricle and pulmonary artery
Mitral valve - Bicuspid
Location
opening between left atrium and left ventricle
Aortic semilunar valve
Location
located between left ventricle and aorta
Chordae tendineae
threads, keep valve flaps from flipping up into the atria
Right Atrioventricular - tricuspid valve
3 flaps that prevents blood from flowing back into the right atrium
Pulmonic - Semilunar valve
prevents blood from flowing back into the right ventricle
Left Atrioventricular - bicuspid valve
prevents blood from flowing back into the left atrium, has 2 flaps ( mitral valve )
Aortic valve
prevents blood from flowing back into the left ventricle
