Arteries

circulation of blood in the blood vessels of the heart muscle (myocardium)

inner layer of blood vessel

middle layer of blood vessel

blood vessel

largest anterior segmental medullary artery

A metarteriole is a short microvessel in the microcirculation that links arterioles and capillaries. Instead of a continuous tunica media, they have individual smooth muscle cells placed a short distance apart, each forming a precapillary sphincter that encircles the entrance to that capillary bed. Constriction of these sphincters reduces or shuts off blood flow through their respective capillary beds. This allows the blood to be diverted to elsewhere in the body. Metarterioles also function as key regulators of microvascular perfusion by dynamically adjusting resistance in response to local m

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blood vessels

all arteries of human body

Small arteries providing blood supply to peripheral nerves

blood vessel