The elements of embryology (1874) The elements of embryology elementsofembryo01fost Year: 1874 206 THE SIXTH DAY. [CHAP. By the thirteenth day the cartilaginous skeleton is com- pleted and the various muscles of the body can be made out with tolerable clearness. Ossification begins according to Von Baer on the eighth or ninth day by small deposits in the tibia, in the metacarpal bones of the hind-limb, and in the scapula. On the eleventh or twelfth day a multitude of points of ossification make their appearance in the limbs, in the scapular and pelvic arches, in the ribs, in the bodies of the
The elements of embryology (1874) The elements of embryology elementsofembryo01fost Year: 1874 206 THE SIXTH DAY. [CHAP. By the thirteenth day the cartilaginous skeleton is com- pleted and the various muscles of the body can be made out with tolerable clearness. Ossification begins according to Von Baer on the eighth or ninth day by small deposits in the tibia, in the metacarpal bones of the hind-limb, and in the scapula. On the eleventh or twelfth day a multitude of points of ossification make their appearance in the limbs, in the scapular and pelvic arches, in the ribs, in the bodies of the cervical and dorsal vertebras and in the bones of the head, the centres of ossification of the vertebral arches not being found till the thirteenth day. SuY- dlagram op the venous circulation at the commencement op the Fifth Day. II. heart. D. C. ductus Cuvieri. Into the ductus Cuvieri of each side fall/. the jugular vein, Sa. V. the superior vertebral, W. the vein from the wing and C the inferior cardinal vein. S. V. sinus venosus. Of. omphalo-mesamic vein. U. umbilical vein, which at this stacre snves off branches to the body-walls. V. G. I. inferior vena cava.
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