Animal Kingdom: Invertebrates Sponges Annelids: Worms Mollusks: Oysters, clams, octopus, snails Arthropods: Insects, spiders, crab/lobster Echinoderms: Starfish

Sponges  Feed by drawing water into spores  No body symmetry, no tissues or organ system

Sponges

Annelids: Worms  Bodies are divided into segments.  Have very well-developed internal organs.  Some have long bristles, some have short. Others seem smooth.  There are about 9,000 species of Annelids known today, including worms and leeches.

Annelids: Worms

Mollusks: Mussel, clam, snail…  Have soft, skin-like organ covered with a hard outside shell.  Some live on land, such as the snail and slug.  Others live in water, such as the oyster, mussel, clam, squid and octopus.

Mollusks: Mussel, clam, snail…

Arthropod: Crustaceans (crab/lobster)  Have hard, external shell which protects their body.  Have a head and abdomen.  Head has antennae, which are part of their sensory system.  Abdomen includes heart, digestive system and reproductive system.  Abdomen also has appendages, such as legs, for crawling and swimming.  Many have claws that help with crawling and eating.

Arthropod: Crustaceans (crab/lobster)

Arthropods: Arachnids (spiders)  Have a hard exoskeleton and jointed appendages for walking.  Unlike other arthropods, spiders do not have antennae.  Common arachnids are the spider, scorpions, ticks and mites.

Arthropods: Arachnids (spiders)

Arthropod: Insects  Largest group of arthropods (over 800,000).  Are very adaptable, living almost everywhere in the world.  Have an exoskeleton that covers their entire body.  An insect's body consists of the head, thorax and abdomen.

Arthropod: Insects

Echinoderm: Starfish  Marine animals that live in the ocean.  Have arms or spines that radiate from the center of their body.  Central body contains their organs, and their mouth for feeding.  Sea stars, commonly known as the starfish, have 5 or more arms attached to their body.  Sea urchins have many spines connected to their body. These spines help to protect them from predators.

Echinoderm: Starfish