. Quain's Elements of anatomy. A, in a fcetus of 10 weeks (from Meckel);a, tabular part ; 1 & 2, lower and upper pairsof centres ; b, lower jjart or basilar and con-dylar portions : ossific centres are seen in thecondylar ijortions. B, occipital bone at birth ; a, tabularpart, in which the four centres have becomeunited into one, leaving tissures betweenthem ; b, b, condylar portions ; c, basilarportion. membrane : those of the face are also deposited in membrane, with the exception of theinferior turbinate bone and a small part of the lower jaw. In the expanded tabular bones theossification s
. Quain's Elements of anatomy. A, in a fcetus of 10 weeks (from Meckel);a, tabular part ; 1 & 2, lower and upper pairsof centres ; b, lower jjart or basilar and con-dylar portions : ossific centres are seen in thecondylar ijortions. B, occipital bone at birth ; a, tabularpart, in which the four centres have becomeunited into one, leaving tissures betweenthem ; b, b, condylar portions ; c, basilarportion. membrane : those of the face are also deposited in membrane, with the exception of theinferior turbinate bone and a small part of the lower jaw. In the expanded tabular bones theossification spreads outwards from the centres, and the marginal portions, in the earlier stages,present more or less the form of radiated fibres or spicula. At birth the sutural edges, andespecially the angles, are incomplete, the bones being united and the interspaces filled up byfibrous tissue. The diploe and air-sinuses are at first absent, some of the latter arising early inlife, and others being fonned at a comparatively late but
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
