1202L11 - 0. 1. 2. 3. 4. Chapter 33 and 34 Know the major...

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Chapter 33 and 34 0. Know the major homologies of annelids and differences among classes 1. Know the major advances of arthropods and differences among sub- phyla 2. Know major homologies of echinoderms and differences among classes 3. Understand differences among chordate subphyla 4. Know major characteristics of vertebrate classes Annelid Characters o Segmentation of body (one set of __organs_____ per segment) o Closed circulatory system with capillary beds for respiration, digestion and muscles o ___kidney_____ is metanephridium (opening from coelom to outside) o Each segment has pair of setae (claws) o NS is ventral nerve cord with circumesophageal ring and anterior ganglia Evolved from free living polychaetes -> oligochaetes -> leeches Table 33.4 Figure 33.22
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Figure 33.23 Figure 33.24 Ecdysozoa Phylum Nematoda 5. Nonsegmented pseudocoelomates 6. No circulatory system or ___circular_____smooth muscle, poor swimmers 7. Free living or __parasistic_______ on plants or animals (trichinosis, elephantiasis) 8. Hard, protective cuticle is shed during growth
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Fig. 33.26 Ecdysozoa Phylum Arthropoda 9. jointed legs 10. exoskeleton of _chitin_______ for efficient muscles (don’t bend around joints) 11. Frees coelom for use as hemocoel (open circulatory system) 12. Exoskeleton must be shed during __growth_____ 13.Segments fused to form tagmata Figure 33.27 Subphylum Chelicerata 2 Tagmata (Cephalothorax and abdomen)
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This note was uploaded on 11/13/2009 for the course BIOL 1202 taught by Professor Gregg during the Fall '08 term at LSU.

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1202L11 - 0. 1. 2. 3. 4. Chapter 33 and 34 Know the major...

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