CV Flashcards
What are the three divisions of the vascular system?
Pulmonary Arc - to and from heart via elastic (pulmonary) vessels
Systemic Arc - blood pumping via elastic and muscular arteries to tissues
Lymphatic
arteries: large to small
aorta, muscular artery, arterioles, terminal vascular bed –> venules –> muscular veins (radial) –> elastic veins (jugular)
lymphatics
affertent. lymph vessels –> lymph channels (ducts) –> elastic veins
tunica intima is composed of
endothelium, asal lamina, subendothelial CT, smooth muscle
tunica intima fibers are ____ to vessel
parallel
tunica intima is vascular or avascular?
avascular
internal elastic lamina
elastic layer outside tunica intima, separates it from tunica media. allows for nutrients to get to tunica media.
tunica media is composed of
smooth muscle (in muscular vessels)and elastic muscle (in elastic vessels) + collagenous fibers.
tunica media fibers are arranged _____ to long axis of vessel
concentric, perpendicular
External Elastic Lamina
around the tunica media
what are the blood vessels and nerves calle that supply the tunica media?
outer half: vasa vasorum and nervi vasorum
inner half: tunica interna?
tunica adventitia runs ____ to long axis of vessel
parallel
tunica adventitia is composed of
collagen and elastic connective tissue + vasa vasorum and nervi vasorum
what is the one constant feature of all vascular components?
endothelium
where are valves present? veins, lymph or arteries?
veins and lymph vessels
what is the difference between elastic and muscular arteries?
elastic arteries conduct blood away from heart while muscular arteries distribute it
in elastic vessels, the ____ layer is thick
tunica media. concentric, fenestrated elastic lamina
in elastic veins, the ____ layer is thick
tunica adventitia
what are the gap junctions that supply tunica intima and inner tunica media of elastic vessels?
myoendothelial junctions
in muscular vessels, tunica media is mostly ____
smooth muscle
muscular arteries have a thick ____ layer
tunica media
