A cross-section of muscle tissue, surrounded by the extracellular tissue that acts as the connective tissue. Each muscle fiber is joined together by the connective tissue to make up the complete muscle. Myasenthia is an neuromuscular disease caused by a faulty relationship between the two. Photo Gallery: Beauty in Science - SPIEGEL ONLINE - News - International
This 'gastric rainbow', is a microscopic section through a mouse stomach. The black area at the top is where food is digested by enzymes and acids, and these are made by the green and magenta cells, respectively. The red cells that line the surface of the stomach secrete mucus to protect the stomach from digesting itself.
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.