periosteum (redirected from periostea)

periosteum /peri·os·te·um/ (-os´te-um) a specialized connective tissue covering all bones and having bone-forming potentialities.

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per·i·os·te·um (pr-st-m)

n. pl. per·i·os·te·a (-t-)

The thick fibrous membrane covering the entire surface of a bone except its articular cartilage and serving as an attachment for muscles and tendons.

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peri·oste·al (-t-l) adj.

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Periosteum

A fibrous vascular membrane that covers bones.

Mentioned in: Tennis Elbow

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periosteum

[per′i·os′tē·əm]

Etymology: Gk, peri + osteon, bone

a thick, fibrous vascular membrane covering the bones, except at their extremities. It consists of an outer layer of collagenous tissue containing a few fat cells and an inner layer of fine elastic fibers. Periosteum is permeated with the nerves and blood vessels that innervate and nourish underlying bone. The membrane is thick and markedly vascular over young bones but thinner and less vascular in later life. Bones that lose periosteum through injury or disease usually scale or die.

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periosteum (per´ēos´tēum),

n the layer of connective tissue that varies considerably in thickness in the different areas of bone. It consists of two layers: an outer layer, which is rich in blood vessels and nerves and shows a dense arrangement of collagenous fibers, and an inner layer, the cambium, in which the fibers are loosely arranged, the cells numerous, and the blood vessels relatively sparse. During active growth, this layer of osteoblasts covers the periosteal surface of the bone. In the quiescent state in the adult, the periosteum primarily provides support. However, the inner layer retains its osteogenetic potencies and in fractures is activated to form osteoblasts and new bone.

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periosteum

a specialized connective tissue covering all bones of the body, and possessing bone-forming potentialities. It is made up of an outer tough fibrous layer and a deeper more succulent osteogenic layer. Periosteum also serves as a point of attachment for certain muscles, tendons and ligaments. The connective tissues fuse with the fibrous layers of periosteum.