Osteoblasts & Osteocyte Cells
Osteoblasts lining the surface of bone
-->Osteoclast in upper right of picture
Osteocyte Sitting in Lacnae
-->Attached to other osteocytes by caniculi
-->Etched in Howship's Lacunae
-->Acid phosphatase in lysosome can be used as a clinical marker for osteoclast activity
Osteoclast Activity in Hyperthyroidism case
-->Osteoclast to far right looks to be degenerating
Osteoclast vs. Megakaryocyte
-->Osteoclasts are multinucleated & found in bone
-->Megakaryocyte is one, fused nucleated cell found in the bone marrow
Compact Vs. Spongy (Trabecular or Cancellour) Bone
Periosteum vs. Endosteum
Periosteum vs. Endosteum II
Primary (Left) Vs. Secondary Bone (Right)
Haversian System (In Cross Section)
-->Can see compact bone (far left); medial to it is trabeclae stains very darkly
-->Bone marrow seen on the top
-->Areas of decalcification seen below
Trabeculae of cancellous bone
-->Contain some osteocytes & osteoblasts on periphery
-->Bone marrow seen below it
Osteopetrosis of bone (right hand side) vs. Normal bone
-->Observe death of bone marrow spaces & small amounts of calcification (in blue) compared to normal
Epiphyseal Growth Plate
-->Appears regardless of mechanical stimulation
Growth of Epiphyseal Plate (5 Zones)
Closure of Epipyhseal Growth Plate
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