Ch_32_Circulatory_System Flashcards
T/F hydra have a circulatory system
F
why don’t small organisms need a circulatory system?
the cells are close together
roles of circulatory system
1)removes wastes from and brings nutrients/oxygen to cell 2) fluid circulation
2 types of circulatory systems
closed and open
3 types of blood vessels
capillaries, arteries, veins
artery role
blood transport from heart
arteries are thick or thin
thick
do arteries expand on heart contraction or relaxation
contraction
capillary role
gas and nutrient exchange
how are gas and nutrients exchanged in capillaries
diffusion/osmosis
how many cells thick are capillaries?
one
capillaries are connected to both _ and _
venules and arterioles
vein role
carry blood to heart
veins when very tiny
venules
arteries when very tiny
arterioles
compared to veins, arteries are _ and _
thick and high pressure
how do veins prevent blood from flowing the wrong way
valves
myocardium definition
muscle tissue in heart
what cavity contains the heart
pericardial cavity
what sac contains heart
pericardium
top chambers of heart are called atria or ventricles
atria
bottom chambers of heart are called atria or ventricles
ventricles
septum role
right and left heart division
atrioventricular valves location
divide ventricles and antria
right atrioventricular valve label
right-tricuspid
left atrioventricular valve label
left-bicuspid
chordae tendineaea role
heart valve support
semilunar valves location
divide heart and arteries
2 major arteries that leave right from heart
aorta and pulmonary artery
pulmonary artery goes to the _
lungs
pulmonary artery carries oxygenated or deoxygenated blood
deoxygenated
aorta carries oxygenated or deoxygenated blood
oxygenated
systole meaning in Greek
contraction
ventricle contraction another word
systole
ventricle relaxation another word
diastole
pulse definition
artery blood flow
sinoatrial node role
regulates heart pace
sinoatrial node location
right atrium, connected directly to medulla in brain
atrioventricular node role
atrium and ventricle movement synchronization
atrioventricular node location
right Atrium
systolic pressure definition
pressure in arteries during contraction
diastolic pressure definition
pressure in veins during relaxation
typical blood pressure
120/80
pulmonary circuit
circuit that has blood flow between heart and lung
pulmonary circuit comes from the right or left side of heart
right
systemic circuit
circuit that has blood flow between heart and body