ARRANGEMENT OF LAMELLAR BONE IN A DIAPHYSIS – 3
A small area of a cross-section of a diaphysis is seen at low magnification in the figure. Observe different types of arrangement of its bone lamellae:
1 – At the periphery of the bone a group of slightly curved parallel lamellae called external circumferential system of lamellae, highlighted in light blue.
2 – At the inner surface of the diaphysis, delimiting the medullary canal, a group of parallel lamellae forms the internal circumferential system of lamellae (highlighted in blue).
3- Short stretches of parallel lamellae that fill the spaces between Haversian systems are called intermediate systems of lamellae (highlighted in a darker shade of blue).
Some Haversian systems are seen in cross sections, indicated by the letter H or highlighted in red.
1 – At the periphery of the bone a group of slightly curved parallel lamellae called external circumferential system of lamellae, highlighted in light blue.
2 – At the inner surface of the diaphysis, delimiting the medullary canal, a group of parallel lamellae forms the internal circumferential system of lamellae (highlighted in blue).
3- Short stretches of parallel lamellae that fill the spaces between Haversian systems are called intermediate systems of lamellae (highlighted in a darker shade of blue).
Some Haversian systems are seen in cross sections, indicated by the letter H or highlighted in red.
