Ch. 3 Sec. 1 What is a Vertebrate?

characteristics ofphylum Chordata

notochord

nerve cord

pharyngeal slits

Similarities in vertebrate

development

3. gives muscles place to attach

2. gives body shape

1. supports & protects body

functions of endoskeleton

(internal skeleton)

A vertebrate’s backbone is part of an endoskeleton, or internal skeleton.

endoskeleton

Snake skeleton

Turtle skeleton

ectotherm• animal whose body temp. does not

produce much internal heat• body temp. changes depending on

temp. of environment• “cold-blooded”• examples:

–fishes–amphibians–reptiles

endotherm• animal whose body controls &

regulates its temp. by controlling internal heat it produces

• body temp. does not change much with environment

• “warm-blooded”• examples:5. birds6. mammals

ectotherm

endotherm

ectotherms endotherms

reptiles

fish

amphibians

birds

mammals

Draw pic ture s of

3 3 .ec totherm s & endotherm s