Ch. 10 - Cardiovascular System Study Guide/Abbreviations Flashcards
Name the 3 major functions of the cardiovascular system
deliver oxygen and nutrients
transports wastes to designated organs
raise blood pressure
Name the 3 heart coverings
endocardium - inner lining
myocardium - muscle layer
epicardium - outer layer
What is the pericardium?
double membranous sac that encloses the heart
What is the difference between parietal and visceral pericardium?
parietal is towards the thoracic cavity
visceral is on the inner surface of the heart
The top of the heart is called the. . .
base
The bottom of the heart is called the . . .
apex
The left atrium . . .
receives O2-rich blood from the lungs
The left ventricle . . .
pumps O2-rich blood to the rest of the body
The right atrium . . .
receives O2-poor blood from the body
The right ventricle . . .
pumps O2-poor blood back to the lungs
The septum . . .
separates right and left sides of the heart
The mitral (bicuspid) valve . . .
separates the left atrium from the left ventricle
The aortic valve . . .
opens to allow O2 blood out to the body through the aorta
The tricuspid valve . . .
separates the right atrium and right ventricle
The pulmonary valve . . .
opens to allow deoxygenated blood to go back to the lungs
What is the difference between mitral and tricuspid valves?
mitral = 2 flaps tricuspid = 3 flaps
What are the small flaps of the heart valves called?
cusps
Name the 2 categories of valves:
atrioventricular (AV)
semilunar
Atrioventricular (AV) valves . . .
separate the atria and ventricles (mitral/tricuspid)
Semilunar valves . . .
have 3 cusps (aortic/pulmonary)
What is the pacemaker of the heart?
sinoatrial (SA) node
The pacemaker of the heart (SA node) . . .
sends impulses to the AV node
What fibers fan out around the ventricles
purkinje
Name 3 characteristics of an artery
very thick-walled to withstand pressure
big
carries oxygenated blood away from the heart
Name 3 characteristics of an arteriole
smaller than an artery
thinner-walled
carries oxygenated blood away from the heart
What are 2 characteristics of a capillary
very tiny
gas exchange occurs here
Name 3 characteristics of a venule
small veins
have valves
carries deoxygenated blood back to the heart
What are 2 characteristics of a vein
have valves
carries deoxygenated blood back to the heart
Systole is . . .
SIS-toh-lee
ventricles contract (forcing blood out of the heart)
Diastole is . . .
dye-ASS-toh-lee
ventricles relax (allowing heart to fill with blood)
systolic pressure . . .
maximum pressure is reached in the ventricles
diastolic pressure . . .
minimum pressure is reached in the ventricles