TEAS 7 cardiovascular system

blood components

plasma, platelets, WBC

blood function

regulates pH, temp., osmatic pressure, transports gas, hormones, nutrients

A blood

A surface antigens, anti-B antibodies in plasma

B blood

B surface antigens, anti-A antibodies in plasma

O blood

universal donor, neither A or B surface antigens, both A and B antibodies

AB blood type

universal recipient, both A and B surface antigens, neither A or B antibodies

deoxygenated blood flow

superior /inferior vena cava, right atrium, tricuspid valve, right ventricle, pulmonic valve, pulmonary artery, lungs

oxygenated blood flow

lungs, pulmonary vein, left atrium, bicuspid valve, left ventricle, aortic valve, aorta, body

arteries

carry O2 away from heart

veins

carry deoxygenated blood to heart

capillaries

site of gas exchange

coronary arteries

deliver nutrients to heart

interatrial septum

thin wall between atria

interventricular septum

thick wall between ventricles

atrioventricular valves

tricuspid, bicuspid

semilunar valves

pulmonary, aortic

pulmonary arteries

blood to lungs

pulmonary veins

blood from lungs

aortic arch

supplies upper body

descending aorta

supplies lower body

systolic pressure

contraction, higher top number = higher pressure

diastolic pressure

relaxation, bottom number = lower pressure

SA Node

primary pacemaker, arial contraction

Bachmann bundle

signals atria, faster rate maker, connects with myocytes, initiates depolarization, contracts

AV node

pace maker, Delay SA node

bundle of His

route between atria and ventricle, internodal tracts, signals AV node

order of electrical conduction

SA node(60-100), AV node(40-60), bundle of his(NA), Purkinje fibers(20-40)

Depolarization

contract

Repolarization

relax