Sharing is not just caring, it's also about giving credit - add this image to your page and give credit to the talented photographer who captured it.:
adventita anatomy aorta artery background blood blue body capillaries cardiology cardiovascular care carry cells circulatory coronary elastic endothelium erythrocyte erythrocytes exchange expand flow healthy heart human illustration inside isolated layer lumen medical medicine microbiology muscle normal organ physiology plasma pressure pulmonary red science section smooth structure system vector vein vessel