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Feeding III – Prey Processing

ZOO: 4926 Oct. 18, 2011. Feeding III – Prey Processing. Lecture Outline Branchial basket/pharyngeal jaw anatomy Pharyngeal jaw musculature Pharyngeal jaw evolution Putting the head together. Upper pharyngeal jaws. esophagous. Lower pharyngeal jaws. Gill arches.

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Feeding III – Prey Processing

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  1. ZOO: 4926 Oct. 18, 2011 Feeding III – Prey Processing

  2. Lecture Outline • Branchial basket/pharyngeal jaw anatomy • Pharyngeal jaw musculature • Pharyngeal jaw evolution • Putting the head together

  3. Upper pharyngeal jaws esophagous Lower pharyngeal jaws Gill arches

  4. Branchial apparatus/basket: anterior is buccal cavityposterior is pectoral girdlesuspended from the skull by a thin bone (PB#1)

  5. Draw and label simplified pharyngeal jaws and the muscles that move them

  6. Lecture Summary • Skull anatomy: mechanical units • Oral jaws: • Suction feeding • timing of muscle activation • shape of buccal cavity • Pharyngeal jaws: • Upper = PB #3&4 • Lower = CB #5 • Feeding evolution: trend of increasing mechanical degrees of freedom and oral/pharygeal jaw mobility

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