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UCLA Phlebotomy Exam 4 (100% guaranteed pass) 2024/2025
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UCLA Phlebotomy Exam 4 (100% guaranteed pass) 2024/2025
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UCLA Phlebotomy Exam 4How big is the heart - ANSsize of a mans fist
how many times does the heart beat per minute? per day? - ANS60-80 per minute
100,000 per day
Four chambers of the heart - ANSright atrium, right ventricle, left atrium, left ventricle
The heart - ANSlocated in the thoracic cavity between lungs
-muscular pump made of cardiac muscle fibers
septum - ANSwall that separates the heart into right and left sides
pericardium - ANSouter double walled sac in the heart that prevents friction allowing it to beat
fast
what are the three layers of the heart - ANSepicardium, myocardium, endocardium
endocardium - ANSInner layer of the heart
Myocardium - ANSmuscular, middle layer of the heart
epicardium - ANSouter layer of the heart
atria - ANSreceives blood into the heart from the body
-contraction pushes blood into ventricles
-left and right atria separated by interatrial septum
right atrium - ANSfills with deoxygenated blood from superior (arms) and inferior (feet) vena
cava
left atrium - ANSfills with oxygenated blood from the pulmonary vein
Ventricles - ANSreceives blood from atria
-contraction pushes blood out of the heart
-left and right ventricles separated by interventricular septum
right ventricle - ANSpushes deoxygenated blood through pulmonary artery
left ventricle - ANSpushes oxygenated blood through the aorta
, which ventricle is bigger/thicker - ANSleft because it has to pump blood to the rest of the body
cardiac cyle - ANSthe complete sequence of events in heart from the beginning of one beat to
the beginning of the following beat
-includes systole and diastole
cardiac output - ANSthe volume of blood ejected from the left ventricle in 1 minute (approx. 5
liters)
stroke volume - ANSthe volume of blood pumped from the left ventricle in one beat
where does the right atrium pump blood to? - ANSinto the right ventricle
where does the right ventricle receive blood from? - ANSright atrium
where does the left atrium pump blood to? - ANSleft ventricle
where does the left ventricle receive blood from? - ANSleft atrium
How many heart valves are there? - ANS4 tricuspid, bicuspid, pulmonary semilunar, aortic
semilunar
tricuspid valve - ANSright atrioventricular valve
-between right atrium and right ventricle
Right AV valve function - ANScloses when right ventricle contracts and prevents blood from
flowing back into right atrium
mitral(bicuspid) valve - ANSleft atrioventricular valve
-between left atrium and left ventricle
Left AV valve function - ANScloses when the left ventricle contracts and prevents blood from
flowing back into left atrium
Pulmonary semilunar valve - ANSbetween right ventricle and pulmonary artery
-at the entrance of pulmonary artery
right semilunar valve function - ANScloses when the right ventricle relaxes and prevents blood
from flowing back to right ventricle
aortic semilunar valve - ANSbetween left ventricle and aorta
-at entrance of aorta
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