Last updated 4 years ago
Intestinal villi, SEM - Stock Image - C010/7943
Intestinal villi. Coloured scanning electron micrograph (SEM) of villi on the lining of the small intestine. Villi are finger-like projections that line the surface of the small intestine and increase the surface area available for the absorption of nutrients from digested food. Magnification: x135 when printed 10 centimetres wide.
Photo Gallery: Beauty in Science - Photo 13 - SPIEGEL ONLINE - International
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
Bee stinger, SEM - Stock Image - C011/9451
Bee stinger. Coloured scanning electron micrograph (SEM) of the end of the abdomen of a small tropical bee, showing the barbed stinger (needle-like). The stinger is used to inject venom when the bee feels threatened. Unlike wasps, bee stingers have barbs which prevent the bee from pulling them out. Instead, the stinger stays in the victims skin and is ripped out of the bee's body, killing the bee. Magnification x70 when printed 10 centimetres wide.
SEM of Human Skin. The top layer of the epidermis is composed of flattened, dead skin cells that form the surface of the skin. The dead cells from this layer are continuously being shed and replaced by cells from the living epidermal layer below it (red). The lowest layer (not seen here) is the dermis. The skin is the body's largest organ, accounting for around 15% of the body's weight. © Eye of Science/Science Source #sem #micrograph #skin #medical #sciencephotos #stockimages #sciencesource
Human embryo at day four
Human embryo at day four | Image Editor Scanning electron micrograph of a human embryo at day 4. The protein coat surrounding the egg (zona pellucida, gold) has been slit to expose the embryonic cells inside (red). These cells go on to form the embryo and can be harvested and cultured to give rise to embryonic stem (ES) cells. Microvilli are visible on the surface of the embryonic cells (blastomeres) and numerous sperm (blue) are still visible on the outside of the zona pellucida.