Cardiac Anatomy & Physiology Flashcards
7 cards from real CVT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Cardiac Anatomy & Physiology flashcards as text
Which layer of the heart wall contains the myocardium?
Answer: Myocardium
The myocardium is the middle muscular layer of the heart wall responsible for pumping action.
The coronary sinus drains deoxygenated blood from the myocardium into which chamber?
Answer: Right atrium
The coronary sinus empties venous blood from the myocardium into the right atrium.
What is the primary pacemaker of the heart?
Answer: SA node
The sinoatrial (SA) node spontaneously depolarizes at the highest rate and sets the heart's rhythm.
During systole, intraventricular pressure exceeds aortic pressure at which point?
Answer: Rapid ejection
During rapid ejection, ventricular pressure exceeds aortic pressure, causing blood to flow into the aorta.
The chordae tendineae connect the papillary muscles to which structures?
Answer: Atrioventricular valve leaflets
Chordae tendineae anchor the AV valve leaflets to papillary muscles, preventing prolapse during ventricular contraction.
Which vessel carries oxygenated blood from the lungs to the heart?
Answer: Pulmonary vein
The pulmonary veins return oxygenated blood from the lungs to the left atrium.
Starling's Law of the Heart states that stroke volume increases in response to what?
Answer: Increased preload (end-diastolic volume)
Frank-Starling law states that greater ventricular filling (preload) stretches myocardial fibers, increasing contractile force and stroke volume.