Laboratory Directions in Principles of Animal Biology
The book Laboratory Directions in Principles of Animal Biology was written by author A Franklin Aaron Franklin Shull Here you can read free online of Laboratory Directions in Principles of Animal Biology book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Laboratory Directions in Principles of Animal Biology a good or bad book?
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Characteristics 4a. May be (1) free-living in water or earth, or (2) parasitic in or on other animals. 46. Bilaterally symmetrical. Examine Planaria. How many planes may be passed through the center of the body, each dividing it into two parts that are mirrored images of one another? 4c. Triploblastic. Examine sections. Note a middle tissue between ectoderm and entoderm. 4d Single gastrovascular cavity (may be wanting in parasitic forms) . Examine an entire planaria; note the gastrovascular cav...ity and its branching form. It has but one opening, the mouth, as in the Coelenterata. 4e. Unsegmented. In Planaria, note that the body is not divided into a series of segments. B. Special Features. In the tapeworm observe: 4/. That the animal is not segmented, but is colonial, the members of the colony being attached in a linear series. Each individual is called a proglottis. 4gr. The head or scolex. The individuals of the colony are successively budded off from the scolex. Note the hooks: also the suckers.
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