1. MONDAY 4/4/16 Learning Goal Name the characteristics that chordates share Describe the main characteristics shared by all vertebrates Explain how vertebrates differ in the way they control body temperature Warm up: What is a vertebrate? Homework: Finish pages 1-4 if needed Test on Chapter 11 sections 1 & 2 on Friday 4/8

2. CHAPTER 11 SECTION 1 WHAT IS A VERTEBRATE?

3. CHARACTERISTICS OF CHORDATES Chordate-- phylum whose membersChordate-- phylum whose members Notochord Nerve chord Slits in their throat area at some point in their life

4. NOTOCHORD flexible rodA flexible rod that supports a chordate’s back Some chordates have a notochord all their lives backboneVertebrates notochord is replaced by a backbone

5. NERVE CORD IN BACK Notochords have a nerve cord that runs down their back Example: spinal cordExample: spinal cord Connection between brain and the nerves, messages can travel back and forth

6. SLITS IN THROAT AREA pharyngealSlits in throat area are called pharyngeal Slits/Gill Slits keep their gill slitsSome chordates keep their gill slits disappear before birthMany vertebrates pharyngeal slits disappear before birth

7. CHARACTERISTICS OF VERTEBRATES VertebrateVertebrate Backbone that is part of an internal skeleton Made up of many similar bones, lined up in a rowMade up of many similar bones, lined up in a row (like beads on a string… the string is the spinal cord) Flexible:Flexible: Supports and allows the animal to move, movable connections between vertebrae

8. BACKBONE Backbone = spineBackbone = spine, runs down center of back Part of the endoskeleton

9. INTERNAL SKELETON Endoskeleton 1.Protects the internal organs of the body 2.Helps give the body shape 3.Gives muscles a place to attach IncludesIncludes Skull,Skull, protects brain Ribs,Ribs, protect heart, lungs, and other internal organs

10. KEEPING CONDITIONS STABLE EctothermsEndotherms Examples Fishes, Amphibians, ReptilesBirds, Mammals Definitionan animal whose body does not produce much internal heat, body temperature changes depending on temperature of environment An animal whose body regulates it own temperature by controlling the internal heat it produces, body temperature does not change much We sometimes call them… “coldblooded” Adaptations…sweat glands and fur/feathers