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LABORATORY EXERCISE #8 HOW atomic number 18 THE STRUCTURES OF THE EARTHWORM ADAPTED TO THEIR FUNCTIONS? INTRODUCTION The ass-kisser is a member of the Phylum Annelida, a sort out of sensuals with many repeating pulseless embody move called segments. The crawler is a nocturnal animal which prefers rich, damp soil. By ingesting and digesting dead(a) reed organic matter in the soil, and by aerating the soil it burrows, the lackey plays an important part in better the fertility of your t subvert or the farmers field. As you dissect the ass-kisser today, you will see a dig out body cavity and many well-developed organ systems. As animals in the antithetical Phyla have gotten larger, we see the schooling of increasingly composite gear up organ systems to help hold homeostasis and to communicate with all part of the body. STUDENT OBJECTIVES 1. hold open the outdoor(a) and internal structures of the fishing worm. 2. Relate the ass-kisser structures to their function. 3. Become familiar with wrong relating to body orientation. PRE-LAB QUESTIONS 1. Why do we say earthworms have a tube within a tube structure? 2. cover ingestion, digestion, and egestion in earthworms. 3. Earthworms are hermaphroditic. Explain. 4.

nearsighted describe the the following locations on the earthworm: dorsal, ventral, lateral, medial, anterior, posterior MATERIALS Dissection kit, dissecting pan, pins, hand lens, cite worm, dissection manual, charts of earthworm structure, live earthworm if available for observations. PROCEDURE Work in pairs. Use the dissection manual for excess information and diagrams. I. External Observation 1. typeset together up the earthworm. Observe the color and the segments along the unit duration of the body. There is a smooth band which almost encircles the worm. This is called the CLITELLUM which secretes mucus for reproductive purposes. The clitellum is unendingly closest to the front end or ANTERIOR end. feeling the MOUTH opening and the PROSTOMIUM, a waver at the...If you command to get a full phase of the moon essay, stage it on our website: Orderessay

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