SCI_240_May_2[1]

SCI_240_May_2[1] - Vertebrate Phylogeny May 2 2011...

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Unformatted text preview: Vertebrate Phylogeny May 2, 2011 Announcements • Final Review Times – I will be on campus all day – Can also e-mail or talk over the phone • Today’s extra session: • Next week: Last class – Short discussion – Lab exam review: Jeopardy! – Evaluations Last Week’s Activity • Vertebrates and Osteichthyans – Vertebral Column vs. Bony Skeleton Vertebrae •Vertebrae are small bones joined together to form a flexible supporting structure • Protects the the spinal cord and provides attachment sites for muscles. •Primitive vertebrae were cartilaginous projections that partially enclosed the notochord http://scienceblogs.com/afarensis/2006/04/27/how_cool_is_that/ Osteichthyans • Old nomenclature: “Bony Fish” -not accurate – Clade includes Tetrapods (which are not fish) • Cartilage and bone are mineralized tissues – Cartilage= can be mineralized with calcium – Bone= heavily mineralized with calcium phosphate • Bony skeleton- refers to ossified endoskeleton, not vertebrae – All Osteichthyans are vertebrates, but not all vertebrates are Osteichthyans Today’s Activity...
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This note was uploaded on 09/23/2011 for the course SCI 240 taught by Professor Staff during the Spring '11 term at S.F. State.

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SCI_240_May_2[1] - Vertebrate Phylogeny May 2 2011...

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