The 'Haversian system' or 'osteon' is the fundamental functional unit of compact bone in:

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The Haversian system (osteon) is the characteristic structural unit of compact (cortical) bone in mammals. It consists of a central Haversian canal (containing blood vessels and nerves) surrounded by concentric layers of calcified matrix called lamellae. Between the lamellae are small spaces called lacunae, which house osteocytes (bone cells). Canaliculi connect the lacunae. Bird bones are pneumatic (hollow), and cartilage lacks Haversian systems.

The 'Haversian system' or 'osteon' is the fundamental functional unit of compact bone in: MCQ with Answer and Explanation

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