Natural Science Lecture

Natural Science Lecture - Features of vertebrates o...

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Natural Science Lecture 13/11/2007 12:58:00 Kardong et al.  p.203-205, 209-222 Larson Chapter 6 pp.133-150 Team Test: Tuesday Nov. 27 th  1PM Tutorial (room 323) Nov 15 3PM Next Tuesday from 2-4. Kingdom - Animalia Phylum Cordata All chordates have at some time, often only during embryonic stage: Notochord – a flexible rod b.w the gut and the nerve. Develops into a  backbone for vertebrates.   Dorsal, hollow nerve chord Pharyngeal slits – Pharynx – down near neck.   Muscular tail after the anus See graph ( evolutionary tree/clatogram) Subphylum Vertebrata
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Unformatted text preview: Features of vertebrates o Vertebrates have vertebrae. o Cephalization formation of heads o Bilateral symmetry o Most have jaws o Some classes have lungs and amniotic eggs Class of vertebrates Mammals Birds Reptiles Amphibians Fish From water to land: development of legs o Note similar bones in size and shape (more change in function than in structure). Amniotic Egg: carries its water supply with it. Sack around the embryo. Lungs 13/11/2007 12:58:00 13/11/2007 12:58:00...
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Natural Science Lecture - Features of vertebrates o...

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