Invertebrates

By: Deja Tone-Pah-Hote

Invertebrates

Invertebrates are an organism without a backbone. They can be found on land and in water.

Sponges

Sponges live in water mostly ocean water but can be found in fresh water. Aldult sponges are session which means that do not move. Water currents carry food & oxygen through the holes & carrys their waste out their bodies. They don't have symetrical bodies and don't have tissues are organs. They can reproduce sexually or asexually. When they reproduce asexually they grow a little thing on the side of them & when it's ready to fall off it begins its own life.

Cnidarians

Have tentacles with stinging cells to protect them and get food, central body cavity, bodies are symmetrical. 2 different body structure types, medusa and polyp. Polyp have a v-shaped body, and medusas have a bowl shaped body. Lives in ocean water.

Moon Jellyfish

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Worms

All worms have long narrow bodies, no legs, have tissue, organs, & body system. There are 3 different types of worms. Flatworms, round worms, & segmented worms. Flat worms have bodies tha

Mollusks

There are over 50,000 species of mollusks and 3 different types. All mollusk commonly have 1 or 2 shells, but there are some that don't have one, their only organ is called a "foot" that they use to get around, & they are symmetrical. The 3 different types are Gastropods, bivalves, Cephalopoda.

Echinoderms

All Echinoderms have tube feet that help them move on the ocean floor, Echinoderms are either male or female & do external fertilization,

Starfish

Starfish use their suction cup feet to help move around and capture prey. Force their stomach out of their mouth to digest their food.
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Arthropods

All Arthropods have an eternal skeleton that molts as they grow, sengmented body & jointed attachments called appendages.

Crustaceans

Crustaceans have 2 or 3 body sections, 5 or more pairs of legs, 2 pair of antennae, & most have gills to get oxygen.

Examples: Crabs, shrimp, & lobsters.

Arachnids

Arachnids have two body sections, combined head and midsection, abdomen, 4 pairs of legs, no antennae, & 4 types of Arthropods.

Examples: Spiders, mites, scorpions, & ticks.

Centipedes and millipedes are the only on in this class of Athropods.

They have long segmented bodies, one pair of anntanae, centipedes are veminious, millipedes have 4 legs per segment, & centipedes have 2 legs per segment.

Insects

Insects have 3 body sections, head, thorax, abdomen. They have 6 legs, 1 pair of antennae, & usually 2 pairs of wings.
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