ch. 22 Flashcards
vessel away from heart is a
arteries
smallest branch of arteries
arterioles
arteries typically carry
oxygen rich blood
carry blood toward the heart
veins
smallest branches of veins
venules
vessels that intimate contact with cells and tissues
capillary
order of blood
heart
arteries
arterioles
capillaries
venules
veins
heart
how many layers of blood vessels
3
innermost layer of blood vessel
inima
middle layer of blood vessel
media
outermost layer of blood vessel
adventitia tunica externa
part of blood vessel vasoconstriction/dilation
media turnica
part of blood vessel that is thick connective tissue
tunica externa
artery three different types
elastic
muscular
arterioles
elastic arteries are the
largest in the body
elastic arteries are good at
pressure reservorirs
examples of elastic arteries
pulmonary trunk
aorta
common carotid
smaller lumen arteries
musuclar arteries
vasocontriction/dilation arteries
musuclar arteries
musuclar arteries examples
external carotid
brachial
femoral
smallest arteries
arterioles
arterial anastomoses
2 diff arteries to form 1
allow alternate pathways for blood to flow
capillaries allow exchange between
blood and interstitial fluid
3 types of capillaries
continuous
fenestrated
sinusoidal
most common types of capillaries
continuous
continuous capillaries found in
skin and muscles
continuous capillaries permability
least
fenestrated capillaries found in
small intestine
endocrine glands
kidneys
choroid plexuses
fenestrated capillaries are permeable
to liquids and small solutes
leaky capillaries
sinusoidal cap
sinusoidal found in
liver
bone marrow
spleeen
single arteriole gives rise to
dozens of capillaries
constrict/dilate blood capillary of
arterioles
sphincters to help flow blood
precapillary
capillaries vs amount of veins and arteries
exceeds vastly
venules collect blood from
capillaries
venules carry blood to
mediuym sized veins
large vein examples
superior vena cava
inferior vena cava
venous sinuses are specilized
flattened veins with thin walls that are reinforced by surrounding tissues
at any given time, 2/3 ofs blood volumne is in
venules and veins
venous valves help prevent
backflow of blood
skeletal muscle pump helpos lower legs move blood
through veins and back toward the heart
pulmonary trunk splits to
l and r pulmonary arteries
aorta and superior branches order
ascending aorta
-aortic arch
–brachicephalic trunk
—right common carotid
—vertebral
–left common carotid
major vessel
co0mmon carotid
common carotid splits to
external (carotid sinus) and internal
ring shaped anastomosis surrounding the pituitary
cerebral arterial circle
blood exits brain through
VEINS
cerebral veins drain into
dural sinuses
liver gets first dibs on
blood
liver gets first dibs on
blood