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Bone awl. In archaeology, bone tools have been documented from the advent of Homo sapiens and are also known from Homo neanderthalensis contexts or even earlier. Bone has been used for making tools by virtually all hunter-gatherer societies, even when other materials were readily available.
Bone canaliculi are microscopic canals between the lacunae of ossified bone.The radiating processes of the osteocytes (called filopodia) project into these canals. These cytoplasmic processes are joined together by gap junctions.
The irregular bones are bones which, from their peculiar form, cannot be grouped as long, short, flat or sesamoid bones.Irregular bones serve various purposes in the body, such as protection of nervous tissue (such as the vertebrae protect the spinal cord), affording multiple anchor points for skeletal muscle attachment (as with the sacrum), and maintaining pharynx and trachea support, and ...
In anatomy, a sesamoid bone (/ ˈ s ɛ s əm ɔɪ d /) [1] [2] is a bone embedded within a tendon or a muscle. [3] Its name is derived from the Greek word for 'sesame seed', indicating the small size of most sesamoids.
A bone is a rigid organ [1] that constitutes part of the skeleton in most vertebrate animals. Bones protect the various other organs of the body, produce red and white blood cells, store minerals, provide structure and support for the body, and enable mobility.
A synchondrosis (or primary cartilaginous joint) is a type of cartilaginous joint where hyaline cartilage completely joins together two bones. [1] Synchondroses are different from symphyses (secondary cartilaginous joints), which are formed of fibrocartilage, and from synostosis (ossified junctions), which is the fusion of two or more bones.
Mesenchymal stem cells within mesenchyme or the medullary cavity of a bone fracture initiate the process of intramembranous ossification. A mesenchymal stem cell, or MSC, is an unspecialized cell that can develop into an osteoblast.
The diaphragm is a barrier method of birth control. [3] It is moderately effective, with a one-year failure rate of around 12% with typical use. [4] It is placed over the cervix with spermicide before sex and left in place for at least six hours after sex.