. The biology of the Protozoa. Protozoa; Protozoa. 20 BIOLOGY OF THE PROTOZOA plete intracellular differentiations are present in the majority of Infusoria, while many of the flagellates, notably the Trichonymph- idse, have an almost equally elaborate make-up. In all such cases the single cell is a complicated mechanism and the cooperating parts have the same relation to the organism as a whole as do the organs M ic--m c. - -. Fig. 2.—Diplodudum ecaudatum, a parasitic ciliate in cattle. A, anal canal and defecatory vacuole; C. F., one of the two contractile vacuole!?; M, motoriuni
. The biology of the Protozoa. Protozoa; Protozoa. 20 BIOLOGY OF THE PROTOZOA plete intracellular differentiations are present in the majority of Infusoria, while many of the flagellates, notably the Trichonymph- idse, have an almost equally elaborate make-up. In all such cases the single cell is a complicated mechanism and the cooperating parts have the same relation to the organism as a whole as do the organs M ic--m c. - -. Fig. 2.—Diplodudum ecaudatum, a parasitic ciliate in cattle. A, anal canal and defecatory vacuole; C. F., one of the two contractile vacuole!?; M, motoriuni with fiber to circumpharyngeal ring; Mac, macronucleus; Mic, micronucleus; S, skeletal layer. (After Sharp.) of a metazoon. Compared with an Amoeba or other simple rhizopod such complex organisms are highly specialized and show the extent to which intracellular differentiation may be carried. As Gurwitsch, Ilartmann, Dobell, and others have pointed out, the applicati(ni (jf the term cell which designates a structural unit with. 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 Calkins, Gary N. (Gary Nathan), b. 1869. Philadelphia, New York, Lea & Febiger
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