Quain's elements of anatomy . 888 THE ALIMENTARY CANAL, &c. bronchia, and ultimately have the air-cells formed as their formative process consists essentially in the budding of hypoblastic Fig. Fig. 795.— Section THROUGH AN ADVANCEDEMBRYO OF A RABBITTO SHOW THE RELA-TIONS OF THE PERI-CARDIAL AND PLEURAL CAVITIES (from Balfour). ht, heart ; po, peri-cardial cavity ; 2^,pleural cavity ; Ig, lung ;al, alimentary tract; ao,dorsal aorta ; ch, noto-chord ; o-p, rib ; st,sternum ; , spinalcord. into mesoblastic sub-stance ; the hypoblastfurnishing the liningepithelium of
Quain's elements of anatomy . 888 THE ALIMENTARY CANAL, &c. bronchia, and ultimately have the air-cells formed as their formative process consists essentially in the budding of hypoblastic Fig. Fig. 795.— Section THROUGH AN ADVANCEDEMBRYO OF A RABBITTO SHOW THE RELA-TIONS OF THE PERI-CARDIAL AND PLEURAL CAVITIES (from Balfour). ht, heart ; po, peri-cardial cavity ; 2^,pleural cavity ; Ig, lung ;al, alimentary tract; ao,dorsal aorta ; ch, noto-chord ; o-p, rib ; st,sternum ; , spinalcord. into mesoblastic sub-stance ; the hypoblastfurnishing the liningepithelium of thetubes, and the meso-blast the other tis-sues, such as niuscu-lar fibres, cartilage,blood-vessels, elastictissue, &c. The division into larger lobes externally, three in the right and two inthe left lung, may be seen at a very early period in the human foetus. Asthe bronchial subdivision extends within the lungs, a tubercular orcoarsely granular appearance is seen over the outer surface, as observedby Kolliker in the human foetus in the latter half of the second is produced by the primitive au^-cells placed at the extremities oframified tubes, which occupy the whole of the interior of the
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
