Lecture18

Lecture18 - Lecture Tetrapod 3/11/2008 9:06:00 AM More...

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Lecture  11/03/2008 08:06:00 Tetrapod More robust because they perform a more structural role (instead of just  attachment point for muscle) Centrum (which replaced the notochord) still has the same gelatinous core Locomotion: swimming They all have gravity acting on them and they would sink if they didn’t have  something to combat that o Buoyancy and lift If the fish wants to move forward, they need thrust but there are drag forces to  contend with: frictional, inertia, turbulence As fish generates thrust, it might move up and down (pitch) but can adjust  pectoral fins to stop that, it might roll but uses dorsal fin to combat it, it’s head will move  in opposite direction of tail Oscillation: moving fins back and forth Undulation: moving entire body back and forth hypocercal tail: vertebral column goes into lower lobe of tail
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This note was uploaded on 04/26/2008 for the course BIOL 305 taught by Professor Green during the Spring '08 term at McGill.

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Lecture18 - Lecture Tetrapod 3/11/2008 9:06:00 AM More...

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