. Elements of zoölogy : a textbook. Zoology. LOWEK AND HIGHER EORMS. FIG. 2. 9. A leaf of Duck-weed (a), much magnified, and fifteen microscopic organisms—plants and auimala—highly magnified. 1. Vorticella convallaria. 2. Volvox globator (a plant). 8. Vaginicola crys/.allina. 4. Amphileptus fasciola. 6. Navicula hippocampus (a plant). 6. Amoeba diffluens. 1. Trachelocerca olor. 9. Stentor polymorphus. 10. Bufsaria tntncatellct. 11. Pandorina morum. 12. Stylonichia mytilus. 13. I'aramecium aurelia. 14. Euplotes truncatus, 15. E. 8. Polytoma uvella. ly complicated structure, and eacli
. Elements of zoölogy : a textbook. Zoology. LOWEK AND HIGHER EORMS. FIG. 2. 9. A leaf of Duck-weed (a), much magnified, and fifteen microscopic organisms—plants and auimala—highly magnified. 1. Vorticella convallaria. 2. Volvox globator (a plant). 8. Vaginicola crys/.allina. 4. Amphileptus fasciola. 6. Navicula hippocampus (a plant). 6. Amoeba diffluens. 1. Trachelocerca olor. 9. Stentor polymorphus. 10. Bufsaria tntncatellct. 11. Pandorina morum. 12. Stylonichia mytilus. 13. I'aramecium aurelia. 14. Euplotes truncatus, 15. E. 8. Polytoma uvella. ly complicated structure, and eacli of the many functions performed by an appropriate set of organs. Such animals not only have organs by which to secure food, but also a stomach and other requisite organs to digest the food, and to change it into blood ; vessels called arteries, capillaries, and veins, in which the blood circulates in all parts of the body, and thus nourishes every part; a heart to propel the blood; lungs or gills, to perform the functions of respiration, by which the blood is purified; glands, to form the various kinds of secretions; organs of excretion, to rid the body of waste material; muscles, and a skeleton to move the parts of the body, and by means of which locomotion is effected ; organs for the purposes of reproduction ; a com- 1*. 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 Tenney, Sanborn, 1827-1877. New York : Scribner
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