Resin cast of arteries in the brain. Your brain consumes about 20% of your body's energy so it needs a lot of blood flow to keep it supplied with nutrients. Even knowing that, the density of the neurons here amazes me--they look almost the size of the brain itself! KNITWEAR CORRELATION
Blood clot. Coloured scanning electron micrograph (SEM) of a blood clot from the inner wall of the left ventricle of a human heart. Red blood cells (erythrocytes) are trapped within a fibrin protein mesh (cream). The fibrin mesh is formed in response to chemicals secreted by platelets (pink), fragments of white blood cells. Clots are formed in response to cardiovascular disease or injuries to blood vessels. Connective tissue (orange) is also seen.