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Encyclopedia > Ossification

Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. The ossified tissue is invaginated with blood vessels. These blood vessels bring minerals like calcium and deposit it in the ossifying tissue. It is thought that this process led to bone as a structural element in vertebrates. Minerals were deposited in cartilage, which was used for storage. Bone was thus an exaptation from the ossified cartilage. This article is about the skeletal organs. ... Cartilage is a type of dense connective tissue. ... Minerals are natural compounds formed through geological processes. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Standard atomic weight 40. ... This article is about the skeletal organs. ... Typical classes Petromyzontidae (lampreys) Placodermi - extinct Chondrichthyes (cartilaginous fish) Acanthodii - extinct Actinopterygii (ray-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Amphibia (amphibians) Reptilia (reptiles) Aves (birds) Mammalia (mammals) Vertebrata is a subphylum of chordates, specifically, those with backbones or spinal columns. ... Minerals are natural compounds formed through geological processes. ... Cartilage is a type of dense connective tissue. ... An exaptation is a biological adaptation where the biological function currently performed by the adaptation was not the function performed while the adaptation evolved under earlier pressures of natural selection. ... Cartilage is a type of dense connective tissue. ...


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SPINALCORD: Heterotopic Ossification - SCI InfoSheet #12 (2039 words)
Heterotopic ossification (HO) is the development of bone in abnormal areas, usually in soft tissues.
The incidence rate of heterotopic ossification in individuals with spinal cord injury is approximately 16 to 53 percent.
Heterotopic ossification may occur anywhere in the body but is most frequently found around the joints or long bones.
Endochondral ossification - Wikipedia, the free encyclopedia (752 words)
Endochondral ossification is one of two types of bone formation (ossification) and is the process responsible for much of the bone growth in vertebrate skeletons, especially in long bones.
During endochondral ossification in the developing fetus, mesenchymal cells aggregate to form a compact grouping of cells in a process called prechondrogenic condensation.
The first site of ossification occurs in the primary center of ossification, which is in the middle of diaphysis (shaft).
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