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Home > All Images > 1997 > June > 4 Jun 1997

Images Dated 4th June 1997

Choose from 9 pictures in our Images Dated 4th June 1997 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

Coloured SEM of section through a human arteriole Featured 4 Jun 1997 Image

Coloured SEM of section through a human arteriole

Arteriole. Coloured scanning electron micrograph (SEM) of a cross-section through a small human artery known as an arteriole. This blood vessel reveals red blood cells travelling through its central lumen. Its inner wall (tunica intima) is thin and appears folded, comprising an endothelial lining and a thin elastic layer which stretches. A thicker tunica media layer (pink) makes up much of the wall of the arteriole, and is almost entirely composed of smooth muscle cells. An outer tunica adventitia layer merges with surrounding connec- tive tissue (yellow). These layers enable the arteriole to expand and contract, regulating the arterial blood pressure. Magnification: unknown