Arteriole, TEM

Arteriole, TEM

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Caption: Arteriole. Transmission electron micrograph (TEM) of a cross-section through an arteriole. This is the smallest in diameter of the arterial blood vessels types. Arterioles, which help to regulate blood flow, consist of one or more layers of smooth muscle cells (the tunica media). Within the blood vessel lumen (centre) are sectioned views of red blood cells (white). Contraction of the arteriole causes the lumen-facing endothelial cells to protrude into the lumen. Normally, in a living arteriole, these cells are flat and slender. Magnification: x1000 when printed at 10 centimetres tall.

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Keywords: anatomical, anatomy, arterial, arterial system, arteries, arteriole, biological, biology, black-and-white, blood vessel, blood vessels, cell, cellular, circulation, circulatory system, erythrocytes, healthy, histological, histology, human body, lumen, microscope, monochrome, no-one, nobody, normal, red blood cells, smooth muscle, tem, tissue, transmission electron, transmission electron micrograph, tunica media, vascular, vascular endothelium

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