Arteries – Flashcards
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Arteries
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Moves blood away from heart
Usually carry oxygenated blood
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pathway of arteries and veins
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Heart → arteries → arterioles → capillaries → venules → veins → back to heart
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Structure of arteries
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tunica externa (adventitia)
tunica media
tunica interna (intima)
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tunica externa (adventitia)
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Outermost
Made up of elastic & collagen fibers
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tunica media
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Middle
Elastic fibers & smooth muscle = allows for blood vessel vasoconstriction (making diameter smaller) & vasodilation (making diameter larger)
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Tunica interna(intima)
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Elastic fibers & endothelial cells
Surrounds the lumen (cavity where blood flows)
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Associated condition of arteries
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aneurysm
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aneurysm
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Part of an artery loses its elasticity, and may rupture
Found in brain & abdominal aorta
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Structure of larger arterioles
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resemble arteries with less elastic components
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structure of small arterioles
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resemble capillaries with smooth muscle wrapped around theme(allowing them to vasoconstrict/vasodilate
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Metarteriole
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can slow blood down before entering fragile capillaries(shaft leaving 1, between 2 in diagram)
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structure of capillaries
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a single layer of cells so that gas exchange occurs here
(gas exchange=give up oxygen and take in carbon dioxide)
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Aorta; pathway from heart
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has four parts; ascending aorta, arch of aorta, thoracic aorta, and abdominal aorta
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offshoots off of ascending aorta
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left and right coronary arteries
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left and right coronary arteries
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supply oxygenated blood to its self
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off shoots of the arch of aorta
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1st-brachiocephalic artery
2nd-left common carotid artery
3rd-left subclavian
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1 pathway of brachiocephalic artery
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brachiocephalic artery-right subclavian artery in chest-right axillary artery
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another pathway of brachiocephalic artery
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brachiocephalic artery-right common carotid artery-head(r. external carotid artery or r. internal carotid artery)
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pathway of left common carotid artery
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left common carotid artery-head((r. external carotid artery or r. internal carotid artery)
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pathway of left subclavian artery
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left subclavian in chest-left axillary in upper arm
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Offshoots of the thoracic aorta
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Parietal branches and visceral branches
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Parietal branches of thoracic aorta
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refers to walls of a body cavity
intercostal artery supplies blood to area between the ribs
superior phrenic artery supplies blood to top of diaghragm
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visceral branches
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refers to covering of organs
esophageal artery supplies blood to esophagus
pericardial artery supplies to pericardium
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offshoots of the abdominal aorta
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parietal branches and visceral artery
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parietal branches of the abdominal aorta
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lumbar artery supplies blood to lower back
inferior phrenic artery supplies blood to lower part of diaphragm
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visceral branches of the abdominal aorta
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celiac artery, gonadal artery and renal artery
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celiac artery of the visceral abdominal aorta
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has branches that supply blood to the liver, stomach, and spleen
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gonadal artery of the visceral abdominal aorta
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supplies blood to either tissues/ovaries
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renal artery of the visceral abdominal aorta
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supplies blood to the kidney
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Pathway of abdominal aorta to legs
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abdominal aorta-common iliac artery-external iliac artery-femoral artery in thigh-popliteal artery by knee
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Pathway of abdominal aorta to legs through urinary system
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abdominal aorta-common iliac artery-internal iliac artery(which supplies blood to bladder, rectum, and thigh)
