Blood vessel

Numéro d’image : 11868584
Blood vessel
Arteriole and capillaries. Illustration of a peripheral arteriole carrying red blood cells (foreground),& capillaries (right),which supply blood to the tissues. The long branched bodies (white) are pericytes. Pericytes are contractile connective tissue cells. Their function is not certain,but they are thought to squeeze the capillaries to increase blood flow. The arteriole wall is encircled by smooth muscle cells which are innervated by sympathetic nerves (white strands). These nerves stimulate the smooth muscle to contract,thereby maintaining blood pressure. Hormones & local factors also affect the diameter,and therefore the blood flow,in these vessels
Licence : Droits gérés
Crédit: Science Photo Library / Bavosi, John
Taille de l’image : 3393 px × 4342 px
Model Release : Non requis
Property Release : Non requis
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