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| Description: Capillaries are microscopic vessels that usually connect arterioles and venules Capillary walls are composed of a single layer of cells and a basement membrane Because their walls are so thin, capillaries permit the exchange of nutrients and wastes between blood and tissue cells Picture Stats: Views: 202 Filesize: 374.01kB Height: 323 Width: 1086 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40255 |