08 RAT LAB 2009 - A. William Allen Office hours: Monday...

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A. William Allen Office hours: Monday 10:00 AM to 1:00 PM or by appointment PAI 1.22G
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Reminder: Exam I on Monday March 30 7:30-9:00 PM Covers labs 1-7 Bring #2 pencil
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Go to the Exam room assigned by lecture time • 8:00 AM lecture room JES A121A • 9:00 AM lecture room UTC 2.112A • 2:00 PM lecture room BUR 106
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Structure? Function?
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Rattus norvegicus Dissection
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Rat Dissection Objectives • A. Describe structures of the rat, using anatomical directions. • B. Describe the major systems of the rat, and compare these system with those of the crayfish and humans. • C. Relate the physiology of the major systems of the rat to its anatomy.
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Anatomical terminology
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ANATOMICAL Directions Cranial (Anterior) / Caudal (Posterior) Dorsal / Ventral Lateral / Medial Proximal / Distal Superior / Inferior
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Structures performing similar functions may or may not share a common ancestry. • Homologous • Analogous
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Homologous Organs which are equivalent morphologically and of common evolutionary origin but which may be similar or dissimilar in appearance or function. bird wing vs. reptile forelimb
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Analogous Organs which are similar in appearance and/or function but which are neither equivalent morphologically nor of common evolutionary origin. bird wing vs. insect wing.
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A. Analogous B . Homologous • 3. Crayfish mandibles & rat jaw
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Taxonomy • Phylum: Chordata • Subphylum: Vertebrata • Class: Mammalia • Order: Rodentia • Family: Muridae • Genus: Rattus • Species: norvegicus or rattus norvegicus
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Phylum Chordata • Invertebrates – Urochordates (tunicates) – Cephalochordates (lanclets) • All vertebrates
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Chordate Characteristics {Structures in embryo stage} • 1. Notochord (gives name to phylum) • 2. Dorsal, hollow nerve cord • 3. Pharyngeal silts/pouches • 4. Segmented body & Postanal tail
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Few notes on notochord • Hollow tube between gut and neural tube
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This note was uploaded on 04/01/2009 for the course BIO 49125 taught by Professor Allen during the Spring '09 term at University of Texas at Austin.

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08 RAT LAB 2009 - A. William Allen Office hours: Monday...

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