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Abstract

The Ostrich tibia belongs to the long bone, which has a complex structure comprising to different types of bone cell, a calcified extracellular matrix and two crisscross pipelines. Few present report concerning on the histological structure of Ostrich tibia had been carried out. This experiment was carried out to investigate the Tibia Morphological characteristics of four Ostriches (one-year-old) with Bone mineral density (BMD), ultrastructure (SEM) and microstructure. The results indicated the BMD of the Ostrich tibia was high, 7-fold greater than chicken (breeding birds) and scanning electron microscopy showed firm and strong, without any honeycomb-shaped structure. Microstructure had three characteristics: layers of cortical bone are clear; outer circumferential lamella and inner circumferential lamella are thicker than those in other animals; a special “transition zone” between the outer circumferential lamella and osteon zone is present. In addition, degeneration and coalesces together with tibia gradually.