. Elementary text-book of zoology. Zoology. FIG. 64. — Transverse section through the gill of a Teleostean fish, b, branchial leaf- let with capillaries ; c, branchial artery con- taining venous blood; d, branchial vein con- taining arterial blood. a, branchial bar. FIG. 63i.—Transverse section through the body of Eu- nice. Br, gill; C, cirrus ; P, parapodiuni with a bundle of seta?; D, alimentary canal; N, nervous system The organs of aerial respiration, on thecontrary, are internal. They present likewise the condi- tion favourable for an exchange of gases between the air and the bloou, viz.,
. Elementary text-book of zoology. Zoology. FIG. 64. — Transverse section through the gill of a Teleostean fish, b, branchial leaf- let with capillaries ; c, branchial artery con- taining venous blood; d, branchial vein con- taining arterial blood. a, branchial bar. FIG. 63i.—Transverse section through the body of Eu- nice. Br, gill; C, cirrus ; P, parapodiuni with a bundle of seta?; D, alimentary canal; N, nervous system The organs of aerial respiration, on thecontrary, are internal. They present likewise the condi- tion favourable for an exchange of gases between the air and the bloou, viz., a large extent of surface. They have the form, either of lungs or air-bearing tubes. In the first case (Spiders, Vertebrates) they consist of spacious sacs with alveolar or spongy. 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 Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
