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An osteocyte, an oblate shaped type of bone cellwith dendritic processes, is the most commonly found cellin mature bone. It can live as long as the organism itself.[1] The adult human body has about 42 billion of them.[2] Osteocytes do not divide and have an average half life of 25 years. They are derived from osteoprogenitor cells, some of ...
Anatomical terminology. [edit on Wikidata] A boneis a rigidorgan[1]that constitutes part of the skeletonin most vertebrateanimals. Bones protect the various other organs of the body, produce redand white blood cells, store minerals, provide structure and support for the body, and enable mobility.
The Human Cell Atlas project, which started in 2016, had as one of its goals to "catalog all cell types (for example, immune cells or brain cells) and sub-types in the human body". [13] By 2018, the Human Cell Atlas description based the project on the assumption that "our characterization of the hundreds of types and subtypes of cells in the ...
Bone is broken down by osteoclasts, and rebuilt by osteoblasts, both of which communicate through cytokine (TGF-β, IGF) signalling. Ossification (also called osteogenesis or bone mineralization) in bone remodeling is the process of laying down new bone material by cells named osteoblasts. It is synonymous with bone tissue formation. [ 1 ]
In the hollow within bones are many other cell types of the bone marrow. Components that are essential for osteoblast bone formation include mesenchymal stem cells (osteoblast precursor) and blood vessels that supply oxygen and nutrients for bone formation. Bone is a highly vascular tissue, and active formation of blood vessel cells, also from ...
The human body is composed of elements including hydrogen, oxygen, carbon, calcium and phosphorus. These elements reside in trillions of cells and non-cellular components of the body. The adult male body is about 60% total body water content of some 42 litres (9.2 imp gal; 11 US gal).
Bone marrow is a semi-solid tissue found within the spongy (also known as cancellous) portions of bones. [ 2 ] In birds and mammals, bone marrow is the primary site of new blood cell production (or haematopoiesis). [ 3 ] It is composed of hematopoietic cells, marrow adipose tissue, and supportive stromal cells.
Chondrocytes (/ ˈkɒndrəsaɪt, - droʊ -/, [1] from Greek χόνδρος (chondros) 'cartilage' and κύτος (kytos) 'cell') are the only cells found in healthy cartilage. They produce and maintain the cartilaginous matrix, which consists mainly of collagen and proteoglycans. Although the word chondroblast is commonly used to describe an ...