Blood-filled foetal aorta, SEM

Blood-filled foetal aorta, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Blood-filled foetal aorta. Coloured scanning electron micrograph (SEM) of a section through a foetal aorta filled with red blood cells (erythrocytes, red). The aorta is the body's main artery. It carries blood from the heart around the body. The vessel wall consists of an inner layer of endothelial cells (tunica intima, purple rippled) surrounded by a muscle wall (tunica media, also purple), which contracts to squeeze blood along the aorta. The beige tissue surrounding the aorta is connective tissue. Magnification: x330 when printed at 10 centimetres wide.

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Keywords: anatomical, anatomy, aorta, artery, biological, biology, blood, blood vessel, cell, cells, circulation, circulatory system, coloured, endothelium, epithelial, epithelium, erythrocyte, erythrocytes, false-coloured, fetal, fetus, foetal, foetus, healthy, histological, histology, human body, lining, muscle, normal, person, rbc, rbcs, red blood cell, red blood cells, scanning electron micrograph, scanning electron microscope, section, sectioned, sem, tunica intima, tunica media, vascular, vessel, vessels

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