Ossification Totally Explained

Everything about Ossified totally explained

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. Bone formation is a dynamic process, with cells called osteoblasts depositing minerals, and osteoclasts removing bone. This process, termed bone remodeling continues throughout life.

Types of ossification

Endochondral ossification: formation of bone by detachment of hyaline bone.
Intramembranous ossification: dissolment of bone from mesenchyme, esp. round bones found in the pelvis
Heterotopic ossification: detachment of bone in extraskeletal hard tissue, esp. in connective tissue or muscle tissue.

Evolution

Several hypotheses have been proposed for how bone evolved as a structural element in vertebrates. One popular idea is that bone developed from tissues that evolved to store minerals. In this model, minerals such as calcium were stored in cartilage, and that bone was an exaptation from this ossified cartilage. However, other possibilities include bony tissue evolving as an osmotic barrier, or as a protective structure.

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