. Text book of zoology. Zoology. 446 Vertehrata. into a tracliea of considerable length, furnished with numerous cartilaginous or bony rings, and dividing below into two branches, one for each lung. Unlike most other air-breathing Yertebrata there are no Tocal cords in the larynx; but most Birds possess a peculiar lower larynx {syrinx) at the junction of the trachea, with the upper ends of the two large bronchi; and here the walls of the bronchi form membranous folds (me and mi, Pig. 374), which are caused to vibrate by the exhalent current of air (for details see below). The lungs are spongy
. Text book of zoology. Zoology. 446 Vertehrata. into a tracliea of considerable length, furnished with numerous cartilaginous or bony rings, and dividing below into two branches, one for each lung. Unlike most other air-breathing Yertebrata there are no Tocal cords in the larynx; but most Birds possess a peculiar lower larynx {syrinx) at the junction of the trachea, with the upper ends of the two large bronchi; and here the walls of the bronchi form membranous folds (me and mi, Pig. 374), which are caused to vibrate by the exhalent current of air (for details see below). The lungs are spongy organs, closely apposed to the dorsal wall of the body- cavity ; in structure, they resemble very closely those of most Eeptiles. A tubular continuation of the bronchus runs through the lung. Fig. 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston
Size: 1270px × 1967px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
