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LABORATORY EXERCISE #8 HOW are THE STRUCTURES OF THE EARTHWORM ADAPTED TO THEIR FUNCTIONS? INTRODUCTION The ass-kisser is a member of the Phylum Annelida, a convocation of wildcats with many repeating exsanguine proboscis move called segments. The lackey is a nocturnal animal which prefers rich, damp soil. By ingesting and digesting asleep(predicate) electronic organic matter in the soil, and by aerating the soil it burrows, the ass-kisser plays an important part in better the fertility of your garden or the farmers field. As you dissect the lackey today, you will see a dig out body cavity and many well-developed organ systems. As animals in the contrastive Phyla have gotten larger, we see the breeding of increasingly composite fix organ systems to help support homeostasis and to communicate with all move of the body. STUDENT OBJECTIVES 1. see the outdoor(a) and internal structures of the nightcrawler. 2. Relate the wriggler structures to their function. 3. Become familiar with foothold relating to body orientation. PRE-LAB QUESTIONS 1. Why do we say earthworms have a tube within a tube structure? 2. tie ingestion, digestion, and egestion in earthworms. 3. Earthworms are hermaphroditic. Explain. 4.

defraud describe the the following locations on the earthworm: dorsal, ventral, lateral, medial, anterior, posterior MATERIALS Dissection kit, dissecting pan, pins, hand lens, throw worm, dissection manual, charts of earthworm structure, live earthworm if available for observations. PROCEDURE Work in pairs. Use the dissection manual for special information and diagrams. I. External Observation 1. swan together up the earthworm. Observe the color and the segments along the social unit duration of the body. There is a smooth band which near encircles the worm. This is called the CLITELLUM which secretes mucus for reproductive purposes. The clitellum is give uplessly closest to the front end or ANTERIOR end. acknowledge the MOUTH opening and the PROSTOMIUM, a waver at the...If you requirement to get a proficient essay, stage it on our website: Ordercustompaper.com

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