Respiratory System Flashcards
blood flow
the volume of blood flowing through a blood vessel, organ, or entire circulation
blood pressure
the force per unit area exerted on a vessel wall by the blood inside of it
will increase blood flow
resistance
the oppostition to flow; the measure of the amount of friction blood encounters as it passes through blood vessels
lower resistance will increase blood flow
blood vessels
begin and end at the heart
arteries
carry blood away from the heart
arterioles
capillaries
transfer blood between veins and arteries
they’re the smallest with the thinnest walls to maximize the exchange of materials between the bloos and interstitial fluid
capillary beds
interweaving groups of capillaries
located in different organs and tissues
veins
carry blood to the heart
venules
smallest vein components that pull blood out of capillaries
pericardium
the heart is inside of the pericardium
contractile cardiac muscle cells
is responsible for the heart pumping
pacemaker cells
noncontractile cells that can spontaneously depolarize without neural input
generates its own electrical impulses and triggers their own APs
2 nodes (SA) and (AV)
heartbeat
the sound/effect created when the ventricles open and then slam shut
systole
when the heart contracts
diastole
contraction, when the ventricules relaxes and pressure drops
electrocardiogram
pleurae
bronchioles
gas exchange
cellular respiration
diffusion
bulk flow
lung capacity
