Osteoclast

An osteoclast  is a type of bone cell that removes bone tissue by removing its mineralized matrix and breaking up the organic bone (organic dry weight is 90% collagen). This process is known as bone resorption.  Osteoclasts and osteoblasts are instrumental in controlling the amount of bone tissue: osteoblasts form bone, osteoclasts resorb bone. (adapted from Wikipedia)

Image from Sanfordburnham.org (link).      Photographer Melanie Hoefer Ph.D

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