CHORDATA

SYTEMS

REPRODUCTION

• Many fish lay eggs except for sharks, Dolphins, and more
• In live bearing and egg laying fish are fertilized on the inside
• Some fishes are both boys and girls that means they're hermaphroditic

NERVOUS / SENSORY

• Smaller brain compared to the rest of their bodies
• The cerebellum and medulla make up the back of the brain
• The four parts of the brain are the medulla (inner organs) cerebellum (coordinator) midbrain and the forebrain
• Normally there are 10 pairs of cranial nerves

CIRCULATORY

• Half of blood is low in oxygen
• Red arteries are at the top of the fishes and are high in oxygen
• Blue veins at the bottom start at the bills and work their way through the heart and to the tail
• The blue veins are also poor in oxygen

OTHER

• Most brands of lipsticks contain fish scales in them.
• Sharks are the only fishes with eyelids.
• Most fish see in color.
• The fish in the middle of the school or group is the strongest.
• Fish can drown.
• If fish tried to chew they would suffocate.

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LATER

PHYLUM

PHYLUM CHARACTERISTICS /BODY PLAN

• Fish have spines
• They also have gills
• More than 465 species living sharks in the ocean

CLASSES

• Fishes class of aquatic vertebrate and are cold blooded
• Fish are vertebrate animals

BYE

DIGESTION

FEEDING AND DIGESTION

• Same digestion system as humans but some fish have different teeth and stomachs because of what they eat.

GAS EXCHANGE

• Because they live in water they have gills
• Water goes through the gills the opposite direction as the blood and because of that fish can extract oxygen 3 times the rate a human can.

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