. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. DEVELOPMENT OF THE STERNUM 167 but there is a marked condensation of the centers of ossification and considerable variation in their number also occurs. In the portion of the cartilage which lies below the junction of the third costal cartilages a series of pairs of centers appears just about birth, each center. Fig. ioi.—Formation of the Sternum in an Embryo of About 3 cm. el, Clavicle; em, episternal cartilage.—(Ruge.) probably representing an epiphysial center of a corresponding rib. Later
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. DEVELOPMENT OF THE STERNUM 167 but there is a marked condensation of the centers of ossification and considerable variation in their number also occurs. In the portion of the cartilage which lies below the junction of the third costal cartilages a series of pairs of centers appears just about birth, each center. Fig. ioi.—Formation of the Sternum in an Embryo of About 3 cm. el, Clavicle; em, episternal cartilage.—(Ruge.) probably representing an epiphysial center of a corresponding rib. Later the centers of each pair fuse and the single centers so formed, extending through the cartilage, eventually unite to form the greater part of the body of the bone. In each of the two uppermost seg- ments, however, but a single center appears, that of the second segment uniting with the more posterior centers and forming the upper part of the body, while the uppermost center gives rise to the manubrium, which frequently persists as a distinct bone united to the body by a Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
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Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
