A&P CHAPTER 18: HEART Flashcards
THE UPPER PORTION OF THE HEART IS THE ___
BASE
THE DISTAL END OF THE HEART
APEX
WHAT IS THE HEART ENCLOSED IN
PERICARDIUM
3 LAYERS OF THE HEART (OUTER TO INNER)
EPICARDIUM
MYOCARDIUM
ENDOCARDIUM
BLOOD FLOW ORDER IN HEART
SUPERIOR/INFERIOR VENA CAVA -> RIGHT ATRIUM -> -> TRICUSPID VALVE -RIGHT VENTRICLE -> PULMONARY VALVE -> LUNGS -> LEFT ATRIUM -> BICUSPID VALVE -> LEFT VENTRICLE -> SEMILUNAR VALVES -> AORTIC VALVE -> AORTA
WHAT SEPARATES LEFT FROM RIGHT SIDE OF HEART
SEPTUM
WHAT ARE THE A-V VALVES
TRICUSPID AND BICUSPID (MITRAL)
WHAT VALVE ALLOWS FLOW FROM VENTRICLE TO BODY
AORTIC VALVE
WHAT SUPPLIES BLOOD TO HEART TISSUES
CORONARY ARTERIES
WHAT PROPERTY DO CARDIAC MUSCLE CELLS HAVE THAT SKELETAL MUSCLE CELLS DONT
AUTOMATICITY - SELF-EXCITABLE
DOES THE HEART FUNCTION OFF AEROBIC OR ANAEROBIC RESPIRATION
AEROBIC
ATRIAL SYSTOLE
ATRIA CONTRACTS, FILLING THE VENTRICLES
VENTRICULAR SYSTOLE
PRESSURE IN VENTRICLES EXCEED ATRIAL PRESSURE AND FORCE OPEN SEMILUNAR VALVES, PUSHING BLOOD INTO PULMONARY AND AORTIC TRUNKS, SOME FLOWS BACK TO VENTRICLES
VENTRICULAR DIASTOLE
VALVES ARE CLOSED AND HEART IS RELAXED
WHEN VENTRICLE PRESSURE DROPS BACK DOWN TO BELOW ATRIAL PRESSURE, THE AV VALVES OPEN AND BLOOD FLOWS FROM ATRIA INTO VENTRICLES
ORDER OF THE HEART’S CONDUCTION SYSTEM
SA NODE, AV NODE, BUNDLE OF HIS, PURKINJE FIBERS
