Explore Scanning Electron Micrograph and more!

Axones nerviosos - A cross section of a bundle of nerve fibers.  Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells.  Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.

Axones nerviosos - A cross section of a bundle of nerve fibers. Axons (orange) are wrapped in myelin (purple); an extension of the membrane of glial cells. Myelin has high lipid content, and acts to insulate the axons, causing them to transmit nerve impulses much faster.

Sweat pore, coloured scanning electron micrograph (SEM). A sweat gland pore (red) opening onto the surface of human skin  Picture: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRAR

Sweat pore, coloured scanning electron micrograph (SEM). A sweat gland pore (red) opening onto the surface of human skin Picture: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRAR

Nerve bundle. Coloured scanning electron micrograph (SEM) of a freeze-fractured section through a bundle of myelinated nerve fibres. Myelin sheaths (yellow) can be seen surrounding the axons (blue). Perineurium (connective tissue, pink) surrounds the nerve bundle while endoneurium divides the individual fibres.

Nerve bundle. Coloured scanning electron micrograph (SEM) of a freeze-fractured section through a bundle of myelinated nerve fibres. Myelin sheaths (yellow) can be seen surrounding the axons (blue). Perineurium (connective tissue, pink) surrounds the nerve bundle while endoneurium divides the individual fibres.

Lung tissue, coloured scanning electron micrograph (SEM). At upper centre is a capillary filled with red blood cells (erythrocytes) and surrounding it are alveolar ducts. Alveolar ducts are the narrowed endings of bronchioles that open into clusters of alveoli (air sacs, not seen). Magnification: x555 when printed 10 centimetres high. Credit: STEFAN DILLER/SCIENCE PHOTO LIBRARY

Lung tissue, coloured scanning electron micrograph (SEM). At upper centre is a capillary filled with red blood cells (erythrocytes) and surrounding it are alveolar ducts. Alveolar ducts are the narrowed endings of bronchioles that open into clusters of alveoli (air sacs, not seen). Magnification: x555 when printed 10 centimetres high. Credit: STEFAN DILLER/SCIENCE PHOTO LIBRARY

colorized SEM of red blood cells in an artery, showing a layer of endothelial cells (beige) surrounded by muscle (pink).

colorized SEM of red blood cells in an artery, showing a layer of endothelial cells (beige) surrounded by muscle (pink).

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