Exam 3 Flashcards
(25 cards)
Heart Tissue, inferior to exterior
Endocardium, myocardium, epicardium, pericardium
What is the epicardium same as?
The visceral layer of the serous pericardium
Pericardium parts
Fibrous, Serous (Parietal/Visceral)
Pectinate Muscles
Act like rugae- folds so heart can expand
Fossa Ovalis
Depression in interatrial septum, remnant of foramen ovale from fetus
Cristae terminalis
Where veins empty into R. Atrium
Coronary Sinus empties into
R. Atrium
Vessels that supply heart
R. Coronary Artery, Anterior Interventricular Artery
Systole
Contracting/emptying
Diastole
Filling, relaxed
Lub sound
Ventricular systole, closing of tri and bi cuspid valves
Dub sound
Ventricular diastole, closing semilunar valves
Avg. BPM
70-80 BPM
Nodes that control heartrate
SA node and AV node
SA node
Pacemaker. 80-100 BPM. In Right Atrium
AV node
Lowers by 40-50 BPM. R. Atrium
Intercalated discs
Like nodes of ranvier, allows action potential to move quickly
Vagus Nerve
Parasympathetic activation of heart
Sympathetic of heart
Fight/flight, shuts AV node down
Purkinje Fibers
Enervate valves
Bundle of His
Transmits action potential from atria, interventricular septum, to ventricular muscles
EDV
End Diastole Volume. Amount of blood in each ventricle at the end of ventricular diastole
ESV
End systolic volume. Amount of blood in each ventricle at the end of ventricular systole
Strove volume
EDV-ESV, the amount of blood pumped from each ventricle in a single beat
