cardiovascular system Flashcards
what 3 parts make up the CV system
heart, blood vessels, blood
heart rate
the number of times your heart beats per minute
stroke volume
the volume of blood pumped out of the left ventricle to the heart during each systolic cardiac contraction
how many litres of blood are in the human body
5 litres
systole
when the heart contracts
diastole
when the heart relaxes
cardiac output
the amount of blood pumped out of the heart per minute
function and characteristics of arteries
carry blood away from heart
thick walls
largest blood cell in the body
function and characteristics of veins
carry blood back to heart
thin and less elastic walls
contains valves to maintains flow
function and characteristics of capillaries
allow diffusion of oxygen and CO2 between blood and muscles
narrow lipumen
thin walls
vasoconstriction
narrowing of blood vessels to areas of body not involved with
exercise
vasodilation
expanding of blood vessels supplying blood to working muscles
cardiac cycle
a series of pressure changes that take place within the heart
recovery rate
the amount of time it takes for the heart to return to resting after exercise
