INVERTEBRATES

6 GROUPS OF INVERTEBRATES

• Arthropods, mollusks, cnidarians, Cephalopods, Echinoderms, worms

ARTHROPODS

• This is the largest group
• Segmented body, exoskeleton, jointed apendeges
• They reproduce sexually through internal fertilization
• Fly, shells, crawl

MOLLUSKS

• Tree snail, clams, Gastropods,
• Soft bodied and most have shells
• Some reproduce by releasing eggs
• Exo-skeleton, head, mantle, false foot
• Ooze, shells, slimy, crawl

ECHINODARMS

• Can regenerate body parts
• Sea cucumber, sea urchin
• Many Echinoderms have spiny skin
• Radial symmetry (appendages)
• Live in water

WORMS

• 3 types of worms, flat, segmented, round
• Round worms and flat worms are to small to see with your eye
• They live in water and in soil/dirt
• They mate and lay eggs (sexually, asexually)
• Simple bodies, but segmented is a bit more complicated

CEPHALOPODS

• Examples are, squids and octopus, lobster
• Cephalopods after they get born change color
• Squids store all there organs in the top of there head
• Octopi and squids have to live in water because it supports there body
• They have tentacles and swim

CNIDARIANS

• Jellyfish
• 2 cell layers
• They lay eggs to reproduce
• Body structure has a mouth a sack, tentacles, an ectoderm, and ectodem
• Swim, jellyfish are 95% water, and have tentacles