Elementary text-book of zoology elementarytextbo0101clau Year: 1884 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
Elementary text-book of zoology elementarytextbo0101clau Year: 1884 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
Size: 1795px × 1114px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
