Beginners' zoology . (Fig. 303.)What is its shape ? If thereis opportunity, dissect andstudy the slender, bony(hyoid) apparatus to whichthe base of the tongue isattached (Fig. 303), the open-ing of the windpipe, ortrachea, the slit-like opening. Fig. 303. — Head of Woodpecker. Cf tongue; a, b, d, hyoid bone; e, g. wind-pipe ; f, salivary gland. of windpipe, which is so narrow as to prevent food fallinginto the windpipe. BIRDS 163 The Internal Organs, or Viscera (Figs. 304 and 305).— The viscera (visse-ra), as in most vertebrates, includethe food tube and its glands; the lungs, the heart, and t
Beginners' zoology . (Fig. 303.)What is its shape ? If thereis opportunity, dissect andstudy the slender, bony(hyoid) apparatus to whichthe base of the tongue isattached (Fig. 303), the open-ing of the windpipe, ortrachea, the slit-like opening. Fig. 303. — Head of Woodpecker. Cf tongue; a, b, d, hyoid bone; e, g. wind-pipe ; f, salivary gland. of windpipe, which is so narrow as to prevent food fallinginto the windpipe. BIRDS 163 The Internal Organs, or Viscera (Figs. 304 and 305).— The viscera (visse-ra), as in most vertebrates, includethe food tube and its glands; the lungs, the heart, and thelarger blood vessels; the kidneys and bladder and thereproductive organs. The lower part, or gullet, is en-larged into a crop. It is largest in grain-eating birds. It
Size: 1970px × 1268px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1921
