Erythrocytes in capillary TEM

Capillaries are so small that red blood cells can only travel through them in single file. Capillaries measure in size from about 5-10 microns in diameter. Capillary walls are thin and are composed of endothelium (a type of simple squamous epithelial tissue). Oxygen, carbon dioxide, nutrients and wastes are exchanged through the thin walls of the capillaries. (from

Image from (link).   Image by David Phillips

Other similar posts
This entry was posted in Blood and tagged , , , , , .