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lecture5F06 - Learning goals Lecture 5 Biological...

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Learning goals: Lecture 5, Biological Diversity (Finish Invertebrates, Vertebrates) Readings: Chapters 33 (finish) and 34 Invertebrates (Ch.33) Annelids; Nematodes; Arthropods, Echinoderms Vertebrates (Ch. 34) Chordates and craniates; Vertebrates; Gnathostomes; Tetrapods, Amniotes, Mammals. Aves, Primates
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Specific readings Fig. 33.23, p. 654, read p. 653, “Annelids are segmented worms” Fig. 33.4, p. 655, Fig. 33.25, p. 655. In cases like this, you need to know that Phylum Annelida contains leeches and segmented marine worns as well as earth worms, but you do not have to k now the names of the Classes. Fig. 33.26, p. 655. Read all of Concept 33.6, pp. 655-656, on Phylum Nematoda. Fig. 33.29, p. 656; Fig. 33.28, p. 656. Read pp. 656-657, “Ceneral Characteristics of Arthropods”. Fig. 33.38, p. 664 Fig. 33.35, p. 660. Read pp. 660-664, Insects. Fig. 33.36, p. 661. Fig. 33.37, pp. 662-663. Know the 4 Orders pointed out in lecture (Coleoptera, Lepidoptera, Diptera, and Hymenoptera). Fi. 33.39, p. 665; Fig. 33.40, p. 667. Read pp. 665-666, “Echinoderms and Chordates are deuterostomes”, and “Echinoderms”. Know what the common names are for the classes, do not need to know scientific names. Fig. 34.1, p. 671. A vertebrate - what we will build up to. Read pp. 671-675, Concept 34.1.
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Specific readings continued Fig. 34.3, p. 673. Fig. 34.4, p. 674. Fig. 34.6, p. 675. Fig. 34.7, p. 677. Read Concept 34.2 pp. 675-676 to “The Origin of Craniates” Fig. 34.9, p. 677, Read pp. 676-677, “Hagfish” Fig. 34.10, p. 678, Read pp. 678, Concept 34.3, “Derived Characters of Vertebrates”, p. 679, “Origins of Bone and Teeth” Fig. 34.13, p. 680. Fig. 34.15, p. 681. Fig. 34.17, p. 683. Fig. 34.18, p. 683, Read pp. 683-68e, “Lobe-fins”. Fig. 34.19, p. 684, Fig. 34.21, p. 685, Read pp. 684-686, Concept 34.5. Fig. 34.25, p. 689, Fig. 34.24, p. 688, Read Concept 34.6, pp. 687-689, up to “The origin and radiation of reptiles”. Fig. 34.27, p. 691.
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Specific readings continued Fig. 34.30, p. 693, Fig. 34.28, p. 692, Read pp. 691-694, “Birds” Fig. 34.32, Read pp. 694-697 (up to “Primates”) Fig. 343.33, p. 695. Fig. 34.34, p. 696. Fig. 34.36, p. 699. Know Orders Carnivora, Primata, Rodentia, Perissodactyla. Fig. 34.39, Fig. 34.39.
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Figure 33.23 Anatomy of an earthworm - segmentation gone crazy! Mouth Subpharyngeal ganglion Pharynx Esophagus Crop Gizzard Intestine Metanephridium Ventral vessel Nerve cords Nephrostome Intestine Dorsal vessel Longitudinal muscle Circular muscle Epidermis Cuticle Septum (partition between segments) Anus Each segment is surrounded by longitudinal muscle, which in turn is surrounded by circular muscle. Earthworms coordinate the contraction of these two sets of muscles to move (see Figure 49.25). These muscles work against the noncompressible coelomic fluid, which acts as a hydrostatic skeleton. Coelom. The coelom of the earthworm is partitioned by septa. Metanephridium. Each segment of the worm contains a pair of excretory tubes, called metanephridia, with ciliated funnels, called nephrostomes. The metanephridia remove wastes from the blood and coelomic fluid through exterior pores. Tiny blood vessels are abundant in the earthworm’s skin, which functions as its respiratory organ. The blood contains oxygen-carrying hemoglobin.
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  • Spring '07
  • Hughes/Berlocher
  • Annelid, Chordates Craniates Vertebrates Gnathostomes Tetrapods Amniotes Mammals, Chordates Craniates Vertebrates, Vertebrates Gnathostomes Tetrapods

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