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What is the annuli fibrosi?
the 4 fibrous rings from which the valve leaflets originate
provide anchor for valve leaflets
What are the layers of the heart valve
spongiosa (loose collagenous and elastic)
Fibrosa- fibrous extensions, collagenous support
Ventricularis- dense CT
What is in the tunica media?
helically arranged layers of smooth muscle, elastin fibers, collagen, proteoglycans to external elastic lamina
What is the outer most layer of vessels?
longitudinally arranged connective tissue
What is the vasa vasorum
the network of blood vessels that supplies oxygen and nutrients to the outer portions of large vessels
What is the function of the tunica media?
regulates vessel compliance with number of elastic fibers, contractile state of smooth muscles
What are the elastic arteries? 6
aorta, pulmonary artery, common iliac, brachiocephalic, common carotid, subclavain
what stain can help differentiate muscular arteries from elastic arteries?
orcein, van giosen, Verhoeff
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