Bone tissue that forms directly within mesenchyme, and does not replace other tissues[TAO]. Intramembranous ossification is the formation of bone in which osteoblasts secrete a collagen-proteoglycan matrix that binds calcium salts and becomes calcified[GO]. Intramembranous ossification is the way flat bones and the shell of a turtle are formed[GO]. Unlike endochondral ossification, cartilage is not present during intramembranous ossification[WP]. [ ]

This is just here as a test because I lose it

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external ontology notes

note the distinction between intramembranous bone and intramembranous bone tissue. Some bones may be a mixture of both tissue types. The MA class most likely refers to a tissue type (it is under bone tissue and connective tissue; there are no child classes)



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