Fish



Fish Info Phylum: Chordata Subphylum: Vertebrata Vertebrates belong to phylum Examples of vertbrates Fish classes Reptiles Birds Mammals
 * 1) No tochorb
 * 2) Dorsal Nervecord
 * 3) Phaiyn geal Pouches
 * 4) Postan altail
 * Have vartebral column potecting the dorsal nerve cord.
 * Bilateral symmetry
 * Endoskeleton
 * Efficient respiratory system
 * Closed circuatory system
 * Nervous system w/ complex brain and sense organs
 * Jawless fish
 * Cartiaginous fish
 * Bony fish
 * Turtles
 * crocodiles
 * Lizards
 * Snakes

2. Body functions
 * 1) Body Structure
 * Bony or Cartilaginous skeletion
 * Paired Fins: used for swimming, steering
 * Scales: thin bony plates
 * Jaws: Used crushing and gnawing food
 * Gills for breathing
 * two- chambered heart
 * Ectotherms (cold-blooded)
 * Swimbladder- air sac used to control depth in water
 * Countershading- dark on doral side; light on ventral used for camouflage
 * Later al line