What is the dense connective tissue covering the outer surface of bone?

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What is the dense connective tissue covering the outer surface of bone?

The dense connective tissue covering the outer surface of bone is the periosteum. It has two layers: an outer fibrous layer made of dense irregular connective tissue that protects the bone and provides a sturdy anchor for tendons and ligaments, and an inner cellular layer that contains osteoprogenitor cells important for bone growth in diameter and for repairing fractures. The periosteum is richly supplied with blood vessels and nerves, and fibers called Sharpey’s fibers anchor the periosteum to the bone itself. This is different from the endosteum, which lines the inner surfaces of bone (such as the medullary cavity and the trabeculae); the perichondrium, which covers cartilage; and the epiphysis, which is the end portion of a long bone rather than a tissue covering.

The dense connective tissue covering the outer surface of bone is the periosteum. It has two layers: an outer fibrous layer made of dense irregular connective tissue that protects the bone and provides a sturdy anchor for tendons and ligaments, and an inner cellular layer that contains osteoprogenitor cells important for bone growth in diameter and for repairing fractures. The periosteum is richly supplied with blood vessels and nerves, and fibers called Sharpey’s fibers anchor the periosteum to the bone itself.

This is different from the endosteum, which lines the inner surfaces of bone (such as the medullary cavity and the trabeculae); the perichondrium, which covers cartilage; and the epiphysis, which is the end portion of a long bone rather than a tissue covering.

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