VERTEBRATES-FISH

BODY STRUCTURE

• Fish have backbones
• Fish have gills to breathe

CHARACTERISTICS

• Scales
• Fins for movement and stability
• Cold-blooded (adjust their body temperature to their surroundings)
• Swim
• Both fresh water and salt water

REPRODUCTION

• Sexual; called spawning (the female releases eggs and the male fertilizes them)

CATEGORIES

• Jawless
• Cartilagenous
• Bony

AMPHIBIANS

CHARACTERISTICS

• Live in both land and water
• Cold blooded-adjust their body temperature to their surroundings
• Go through dramatic changes from birth to adult called Metamorphosis
• Camouflage helps amphibians survive

BODY STRUCTURE

• Slippery,slimy skin (keeps them from drying out; skin helps them breathe--1/2 of their oxygen is taken in through the skin)
• Breathe with gills first, then lungs
• Grow legs

REPRODUCTION

• Sexual (both external and internal fertilization of eggs)

EXAMPLES OF AMPHIBIANS

• Frog
• Salamander
• Toad
• Caecilians (only in South America and Asia)