AIM: What is a vertebrate?

OBJ: Given notes and activity sheet SWBAT explain the characteristics of chordates and vertebrates with 70% accuracy

DN: Distribute Vertebrate Review Sheets

ACT: Introduction to Chordates & Vertebrates (notes) Introduction to Ectotherms vs. Endotherms

Text, read p. 80-83, Complete What is a Vertebrate? Activity Sheet

HW: Complete What is a Vertebrate? Activity Sheet; Invertebrate Exam, Nov 12.

Chordate CharacteristicsNotochord – flexible rod (pre-backbone / vertebral column), nerve cord (pre-spinal cord) running down back and slits in throat area.

Phylum Chordata: all vertebrates, few invertebrates

Lancelets

nerve cordnotochord

gill slits

Human embryonic gill slits

Human Embryo

Vertebrate Characteristicsendoskeletonprotects organs, body shape/support, muscle attachment

backbone (vertebral column, “spine”)protects spinal cord and provides flexibility

Ectotherms vs. EndothermsEctotherm: an animal whose body temperature is close to the temperature of their environment; its body does not produce much internal heat ;

“cold-blooded”.

Example: fishes, amphibians, reptiles

Endotherm: an animal whose body temperature is stable and often warmer than their environment; its body regulates its own temperature by controlling the internal heat it produces;“warm-blooded”

Example: birds, mammals

White/Yellow = Warm Blue/Purple = Cold