Dry/Compact Bone (T.S.)
Grounded thin section of dried bone shows empty canals for blood vessels, lacunae for osteocytes and connecting canaliculi. Important Labels: Osteon ( Structural unit) Haversian Canal (central canal) Lamellae (thin plates of bone that contain Osteocytes) Lacunae (almond shaped spaces that contain Osteocytes) Cement line : boundary between each Osteon Volkmann Canal : also called Perforating Canal, it is anastomoses between central canals. External Circumferential lamellae : forms external wall of compact bone Internal Circumferential lamellae : forms internal wall of compact bone (endosteum along the marrow cavity). “In living bone lacunae of each Osteon house Osteocytes & Central/Haversian canals contain reticular connective tissue, blood vessels and nerves.”