The article presents the results of morphological studies of cross-sectional area growth in the first and second phalanges, their bone-marrow cavities and compacted tissue in the postnatal ontogenesis of Ro-manov sheep. As the material for this work we used the I and II phalanges, taken from the left thoracic limb of opposite gender twins at birth, as well as at 3,6,9,12 months of age and in adults 3–4 years of age. To identify phalanges development patterns we used classical morphological methods of research: we determined the growth rate (“K”), age-related changes in the cross-sectional area of the first and second fingers, their bone-marrow cavities and compacts in the studied age periods (M ± m) and in relation to the same indicator in adult sheep in %.. The received digital material was subjected to static processing. It was established that, due to the periosteal growth of bone tissue, cross-sectional area of the I and II phalanges increases all the time, reaching the definitive value by 12 months at the I phalanx, and in the II phalanx it occurs somewhat later. More accelerated periosteal growth is observed in both phalanges in the first three months of lambs’ life. Due to the processes of bone resorption on the side of endosteum, the same thing happens with the cross section of bone marrow cavities, they only reach the definitive state a little earlier, that was noted in the cross section of the bones. In general, the intensity of periosteal growth and resorption processes occur more quickly in I phalanges compared with II.
Modelling normal age-related changes in individual retinal layers using location-specific OCT analysis
