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Low power scanning electron microscope image, showing osteoporotic architecture in the fourth lumbar vertebra of an 89 year old woman (x20). The bone is heavily eroded in places by the action of osteoclasts and consists mainly of thin, fragile struts.

Low power scanning electron microscope image, showing osteoporotic architecture in the fourth lumbar vertebra of an 89 year old woman (x20). The bone is heavily eroded in places by the action of osteoclasts and consists mainly of thin, fragile struts.

Picture of a child's upper and lower mandible showing first baby teeth and Second pre-formed adult teeth including molars and wisdom. a.b.♡

Picture of a child's upper and lower mandible showing first baby teeth and Second pre-formed adult teeth including molars and wisdom. a.b.♡

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.

Paludisme : les parasites discutent pour se synchroniser

Paludisme : les parasites discutent pour se synchroniser

Oocysts of the parasite that causes rodent malaria, Plasmodium yoelii nigeriensis developing on the midgut wall of the mosquito Anopheles stephensi.

A scanning electron microscope picture of a nerve ending. It has been broken open to reveal vesicles (orange and blue) containing chemicals used to pass messages in the nervous system.

A scanning electron microscope picture of a nerve ending. It has been broken open to reveal vesicles (orange and blue) containing chemicals used to pass messages in the nervous system.

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.

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