A&P Chapter 13 Test Flashcards
Different layers of the heart
Epicardium: outermost
Myocardium: thick, middle layer
Endocardium: inner layer
Differences between the two major blood vessels
Arteries: thick, strong walls with three layers and have high blood pressure as they pump blood away from the heart.
Veins: thinner wall but similar layers. It carries blood with low blood pressure and goes toward the heart.
Blood going to the heart:
Veins
Blood away from the heart:
Arteries
Systemic circuit:
when blood goes from the heart to the body and back to the heart (veins and aorta)
Pulmonary circuit:
Sends oxygen-poor blood from the heart to the lungs and back to the heart (pulmonary arteries and pulmonary veins)
Blood to the lungs:
Pulmonary arteries
Blood away from the lungs:
Pulmonary veins
List four valves of the heart
Tricuspid Valve, bicuspid valve, pulmonary valve, aortic valve
AV valves
tricuspid valve and bicuspid valve
Semilunar valves
pulmonary valve and aortic valve
Tricuspid valve
Prevents blood from moving from the right ventricle to the right atrium during ventricular contraction
Biscupic valve
Prevents blood from moving from the left ventricle to the left atrium during ventricular contraction
Pulmonary valve
Prevents blood from moving from the pulmonary trunk to the right ventricular during ventricular relaxation
Aortic valve
Prevents blood from moving from the aorta into the left ventricle during ventricular relaxation.
What are AV valves
Valves that deal with ventricular contraction and are located between the aorta and ventricles
What are Semilunar valves
Deals with ventricular relaxation and is located between the ventricles and the aorta and the pulmonary arteries.
