ANIMAL UNIT 2

SPONGES

• Absorbs water for food
• Young sponge grows off parent
• Has holes to absorb water
• Examples: liver sponge,
• Barrel sponge, etc.

SPONGES

• Squishy, has many holes.

WORMS

• Round worms, flat worms,
• Segmented worms
• Put eggs in a sack after
• Mating
• Some reproduce asexually

WORMS

• Some are parasitic
• Some live in ground
• Have 5 hearts
• Can regrow body parts

ECHINODERMS

• Tube feet to move across ocean floor
• Can regrow limbs
• Examples: sea stars, sea urchins,
• Sea cucumbers, etc.

ECHINODERMS

• Diet: sea stars eat small
• Invertebrates. Others eat coral or kelp.

ARTHROPODS

• Have exoskeleton which they molt
• Examples: insects, arachnids, bugs
• Some arthropods are carnivores
• Some are herbivores
• Jointed limbs, segmented body

MOLLUSKS

• Some have shells which they molt
• Others have no exoskeleton
• Examples: snails, slugs, squids,
• Octopi, etc.
• Soft body, hard shell(for some)

CNIDARIANS

• Soft squishy body
• Sexual reproduction
• One stage is asexual
• Examples: jellyfish, coral
• No brain instead nerve net

CNIDARIANS

• Uses tentacles to sting prey
• Mostly are Carnivores
• Eats small crustaceans