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What is a Vertebrate? (Characteristics of Chordates (Nerve Cord in Back (A…
What is a Vertebrate?
Characteristics of Chordates
Notochord
Chordates will have a notochord
Which is a nerve cord down the back
A flexible rod
Nerve Cord in Back
A chordates have a nerve cord that runs down their back
Its a connection between the brain and nerve
Spinal Cord is a nerve cord
Slits in Throat Area
Chordates have slits in there throughout area called pharyngeal
Humans ones disappear before birth
Also called gill slits
Characteristics of Vertebrates
Backbone
A vertebrate has a backbone that is part of an internal skeleton
Runs down center of down
Formed by many bones called vertebrate
Lined up like beads
Makes you bend over
Internal Skeleton
Part of endoskeleton
Protects internal organs of body
Gives muscles a place to attach
Body shape
Includes skull and ribs
Skull
Protects brain
Ribs
attach to vertebrae and projects ribs
Keeping Conditions Stable
Ectotherms
These are Amphibians, fishes, reptiles
There body temperature depends on the environment temp.
These animals cannot produce much internal heat
Endotherms
An animal whose body regulates its own temperature by controlling internal heat
Body temp. usually does not change, even if environment does
Birds and mammals