Heart Quiz

32 terms by zuri21 

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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.

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