. The structure and life of birds. Birds; Evolution. 28o THE STRUCTURE AND LIFE OF BIRDS chap. incubation, but not through its gill arches, nor through the lungs, which are not for some time connected with EA. Fig. 67.—(After Duval.) Embryo of sixty-eight hours, bi, forebrain, to become optic lobes; B2, mid brain ; B3, hind brain, to divide into cerebellum and medulla oblongata ; ch, cerebral hemispheres ; e", eye ; ea, internal ear ; c, gill arches, with clefts between ; h, heart; n, notochord, to pass into backbone ; nl, nasal pit. the heart, and do not set to work till respiration begi
. The structure and life of birds. Birds; Evolution. 28o THE STRUCTURE AND LIFE OF BIRDS chap. incubation, but not through its gill arches, nor through the lungs, which are not for some time connected with EA. Fig. 67.—(After Duval.) Embryo of sixty-eight hours, bi, forebrain, to become optic lobes; B2, mid brain ; B3, hind brain, to divide into cerebellum and medulla oblongata ; ch, cerebral hemispheres ; e", eye ; ea, internal ear ; c, gill arches, with clefts between ; h, heart; n, notochord, to pass into backbone ; nl, nasal pit. the heart, and do not set to work till respiration begins with the hatching of the bird. The system of breath-. 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 Headley, F. W. (Frederick Webb), 1856-1919. London, New York, Macmillan
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, bookyear1895
