161-178 invert 1 - MORPHOLOGY AND INVERTEBRATES I(Campbell 7th e d pages 630-636 638-656 8th e d 658-664 670-682 I Morphology Sponges III IV

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LAB Invertebrate I Page # 161 MORPHOLOGY AND INVERTEBRATES I (Campbell, , 7 th ed., pages 630-636, 638-656, 8 th ed. 658-664, 670-682) I. Morphology III. Cnidaria V. Annelida II. Sponges IV. Platyhelminthes VI. Mollusca Objectives : at the completion of this exercise you should be able to: 1. Compare and contrast the way in which major invertebrate phyla solve problems of living in a freshwater, marine, or terrestrial environment. Think of locomotion, body support, protection, food acquisition, osmoregulation, and water balance. 2. Describe the various body plans of organisms and relate them to the ecology of organisms. 3. List features, thatdistinguish animals from protists, plants, and bacteria. 4. Discuss the similarities and differences among the organ systems of Cnidarians, Platyhelminthes, Annelids, and Molluscs. Know the anatomy of representative species. 6. Define and discuss: radial and bilateral symmetry, cephalization, open vs. closed circulatory systems and metamorphosis. Apply these terms to the various phyla. 7. Compare modes of locomotion. 8. Be familiar with the demonstrations of various members of these phyla. Requirements: ( ). The pre-lab on page is due at the beginning of lab. The worksheet and chart should be filled out as you work through the lab. The worksheet is due at the end of lab. The review sheet should be reviewed during the lab. ( ). Review the phylogenetic tree on page 148 as it summarizes some of the main features evolved by the various taxonomic groups. OVERVIEW In this exercise you will learn various anatomical terms and study several representative animals of four invertebrate phyla: Cnidaria, Platyhelminthes, Annelida, and Mollusca. These organisms differ in some aspects, but to some extent, each engages in food gathering, digestion, excretion, and responsiveness to the environment, gas exchange and reproduction. In order to examine the anatomy and physiology of various organisms you will need to build a vocabulary of terms that refer to body planes, sections, and relative location. The section on morphological terms should help. A review check list and a chart for each lab is found in the appendix. Fill out the worksheets and charts as you do the lab. A glossary of selected terms can be found at the end of this section. Please examine the various demonstrations of animal diversity. You will work in pairs for the dissection exercises. I. MORPHOLOGICAL TERMS Know the following anatomical terms. Figure 1 helps clarify the terms. Know them, as they will be used frequently. l. Descriptive Terms : Dorsal: describing the back portion of a structure Ventral: describing the lower surface of a structure Medial: describing the mid region of an organism Lateral: the sides, right and left Anterior: the head end, or the part, which moves forward Posterior: the tail end of the animal Distal: away from the main mass of the body (e.g., the fingers) Proximal: near the main mass of the body (e.g., shoulder, thigh)
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This note was uploaded on 10/29/2009 for the course BIO biology taught by Professor Meighan during the Fall '09 term at University of California, Berkeley.

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161-178 invert 1 - MORPHOLOGY AND INVERTEBRATES I(Campbell 7th e d pages 630-636 638-656 8th e d 658-664 670-682 I Morphology Sponges III IV

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