Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . at the upper part is coveredwith small parietal cells;but these gradually becomesmaller and smaller, lessand less distinct, and finallydisappear entirely, so thatthe lower part of the lungis completely vesicular andun vascular. [§ 388. In the class of birds we observe, in the p:_ 9oQ A rig. 239.—A, several cells from the same interesting manner, lung of a Tortoise. A portion of one of the general type of the these cells is exhibited in B,
Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . at the upper part is coveredwith small parietal cells;but these gradually becomesmaller and smaller, lessand less distinct, and finallydisappear entirely, so thatthe lower part of the lungis completely vesicular andun vascular. [§ 388. In the class of birds we observe, in the p:_ 9oQ A rig. 239.—A, several cells from the same interesting manner, lung of a Tortoise. A portion of one of the general type of the these cells is exhibited in B, magnified lung preserved, but the sur- five hundred times—part of the septum, face of contact is greatlvin- a> a which ^ides this cell from those creased bv means of narif next to il> ° and d is seen The ves - Pane; sels are injected with sizeand vermilion,tal cells, which are repeated and form such thick masses, that theagain and again. This mo- islets of pulmonic parenchyma betwixtdification is made necessary taem almost the larger quantity of blood which is here transmitted to / ..»->>• e « • r - 7 » - •>. 228 EESPIEATIOB .
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
