Irene Downie

Irene Downie

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Irene Downie
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skin cell

Coloured scanning electron micrograph SEM of a squamous cell on the surface of the skin. This is a flat, keratinised, dead cell. Squamous cells are continuously sloughed off and replaced with new cells from below. Magnification: when prin

bundle of nerves. 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. I must try to remember that my nerves are this beautiful, not just a series of ill-functioning, trouble-causing body parts.

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.