and CORRECT Answers
right heart - CORRECT ANSWER - Pulmonary circulation
Pumps blood through the lungs
left heart - CORRECT ANSWER - Systemic circulation
Pumps blood through the body
Mediastinum - CORRECT ANSWER - where the heart is located
layers of the heart - CORRECT ANSWER - outer to inner= pericardium, myocardium,
endocardium
Pericardium - CORRECT ANSWER - Double-layered (parietal and visceral layer)
membrane surrounding the heart.
-between the two layers is pericardial cavity and fluid (10-30mL) which lubricates the the 2
membranes
-less that 10 mL= friction and pain
-more that 30 mL= tourniquet and cannot pump
Myocardium - CORRECT ANSWER - -middle layer- thickest
-composed of cardiac muscle
-provides contractile force to pump blood
-electrical impulses move through this layer
endocardium - CORRECT ANSWER - inner lining of the heart
, right atrium - CORRECT ANSWER - receives deoxygenated blood from the body through
the superior and inferior vena cava
right ventricle - CORRECT ANSWER - pumps blood to the lungs to get oxygenated
left atrium - CORRECT ANSWER - receives oxygenated blood from the lungs
left ventricle - CORRECT ANSWER - pumps oxygenated blood to the body- has to pump
against blood pressure - thickest myocardium
septal membrane - CORRECT ANSWER - divides right and left heart
-prevents blood from crossing over
atrioventricular valves - CORRECT ANSWER - tricuspid and mitral valves
-prevents back flow of blood
diastole - CORRECT ANSWER - ventricular relaxation - atrioventricular valves are open
& semilunar valves closed
Systole - CORRECT ANSWER - Contraction of the heart- atrioventricular valves are
closed & semilunar valves open
semilunar valves - CORRECT ANSWER - pulmonary valve and aortic valve
cardiac cycle - CORRECT ANSWER - each complete heartbeat
cardiac cycle steps - CORRECT ANSWER - 1.) atrial contraction
2.) isovolumetric ventricular contraction- pressure is building up in ventricle