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32 terms

Heart Quiz

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pericardium
membrane that surronds the heart-> secrets fluid and decreases frcition
arteries
what carries blood away from the heart, thick walled
arterioles
small arteries
capillaries
small vessels where blood cells move single file-> good for gas exchange
venules
return blood to heart, small veins that drain blood from the capillaries and then join to form a vein
veins
larger vessels whith valves that bring blood to the heart
P
the part of the cardiac cycle where the ventricles are filled
QRS
when the blood moves out of the heart as the ventricles squeeze
T
the relaxation period before the heart refills
sinoatrial node
the hearts pacemaker
varicose veins
valves in legs leak and veins bulge
myocardial infarction
fancy name for heart attack
fibrillation
sinoatrial node loses control of the heartbeat
aneurysm
increased blood pressure weakens the wall of an artery and can burst
transports materials, defends against pathogens, regulates temperature, regulates pH
main functions of blood
plasma
the liquid part of blood, formed from water, proteins, wastes and metabolites
formed elements
solid part of blood
red blood cells
live about 4 months, never replicate, concave (which allows them to stack, increases flexibility, and increases surface area)
function of RBC
carry oxygen and pick up CO2
hemoglobin
what oxygen attaches to in the blood (what CO2 binds to faster than oxygen)
white blood cells
kill pathogens, about 1-2 for every 1000 of their counterpart
platelets
clotting proteins-> sticky barrier at site of an injury
Hemolytic Disease of the Newborn
the resulting disease when a mother is Rh- and her baby is Rh+
anemia
a lack of RBCs which means a lack of O2->makes you tierd
embolism
a clot that travels to the lungs
thrombosis
a clot that forms deep in a vein
hemophilia
lack of a clotting factor-> a genetic, sex-linked, recessive trait
leukemia
cancer of the WBCs-> cells travel out of the bone marrow and attack healthy cells
hematocrit
the oercentage of blood that is composed of RBC->usually around 45
systolic pressure
the increase of pressure as the heart contracts and sends a surge of blood throughout the body
diastolic pressure
the decrease of pressure when the heart relaxes between beats
brachial artery
main artery that carries blood to the arm.