Arthropods Kingdom Animalia Phylum Arthropoda

There are ____ kinds of invertebrates. six Invertebrates are animals that have no backbone. There are ____ kinds of invertebrates. six You have already learned about four kinds. Worms Sponges Mollusks Cnidarians

There are four main kinds of arthropods. An arthropod is an invertebrate with an exoskeleton, a segmented body, and jointed legs. There are four main kinds of arthropods. 1. Crustaceans 3. Centipedes & Millipedes 2. Spiders & Scorpions Ticks & Mites 4. Insects

There are more than 1 million kinds of arthropods on Earth.

An exoskeleton is a hard, outer covering. All arthropods have an An exoskeleton is a hard, outer covering.

Some arthropods grow too big for their exoskeletons. molt. These arthropods will Molting is to leave an exoskeleton and grow a new one.

More Characteristics of Arthropods Arthropods have a heart to pump blood through their bodies. Arthropods reproduce sexually.

Crustacean Kingdom Animalia Phylum Arthropoda Class Crustacea

Crustacean Crustaceans are ... Crabs Lobsters Barnacles Shrimp A crustacean is an arthropod that has a hard, exoskeleton, two pairs of antennae, and a mouth for crunching and grinding. Crustaceans are ... Crabs Lobsters Barnacles Shrimp

Features of Crustaceans Bilateral symmetry Bodies divided into two segments Cephalothorax Head and chest region Abdomen Including the tail, if present Carapace – part of the exoskeleton that covers the head and chest region

Crustaceans such as lobsters, crabs, and shrimps have five pairs of legs located under their carapace. they are referred to as the decapods (meaning “ten legs”).

The head contains two eyes, two pairs of antennae, and special mouthparts used for feeding. The thorax contains the food-getting appendages and the walking legs.

Some crustaceans, such as the lobster, can glide along the sea bottom by using their small paddle like appendages, called swimmerets, which are located under the abdomen.

Lobster Lobsters are predators! Two common lobster species are the northern lobster and the spiny lobster. Lobsters are aggressive and often fight amongst themselves. Lobsters can regrow limbs! Lobsters are predators!

Crabs Crabs live everywhere—on land and in the sea, and from surface waters down to the great ocean depths. More than 4000 species of crabs.

Fiddler Crab Digs tunnels in the sand along the shore When the tide comes in, fiddler crabs retreat to the tunnels and plug up the entrances with sand. At low tide, the fiddlers leave their tunnels to search for food. Named for its one large claw

mole crab lives in the turbulent tidal zone along sandy beaches

Hermit crab born with a soft abdomen that lacks an exoskeleton, making it vulnerable to attack. For protection, the hermit crab finds an empty snail shell to live in. As the hermit crab increases in size, it outgrows its old snail shell and has to find a larger one.

Giant spider crab The biggest crab in the ocean Can have legs 4 meters long!

Shrimp Looks like a smaller version of a lobster

Copepods Most abundant crustacean in the ocean Less than ½ cm long Eats mainly diatoms very important part of the zooplankton community

Krill Cold water relative of the copepod Grow to 5cm in length Most krill live in Antarctic waters planktonic animal eats diatoms

Amphipod live in the intertidal zone Related to Pill bugs

Isopod Live in intertidal zone seven pairs of legs Some are parasitic; they live by attaching to the gills and skin of fish Examples: sea roaches

Barnacle often mistaken for a mollusk Found in intertidal zone attached to rocks and other hard surfaces Its overlapping, sharp calcium carbonate plates, which resemble a mollusk’s shell, protect the animal inside.

Barnacles continued Barnacles attach to almost anything Filter feeders Hermaphrodite

Horseshoe Crab Class Merostomata not a true crab; No antennae six pairs of legs actually more closely related to spiders and scorpions than to crustaceans has four eyes—two simple eyes and two compound eyes—located on the top of its carapace

Horseshoe crab continued Tail used for locomotion and flipping itself over Lay eggs in the sand in the spring Can live up to 20 years Has been around for 400 million years

2-3: Echinoderms spiny skin Kingdom Animalia Phylum Echinodermata * Echinoderm means _______________. All echinoderms have spiny skin. spiny skin

Echinoderms five There are ______ characteristics of echinoderms. All echinoderms have: Spiny skin An internal skeleton A five part body A water vascular system Tube feet

Characteristics of Echinoderms * All echinoderms have __________. Some of them have small hair-like spines, like the starfish. spiny skin * Some echinoderms have long spines, like the sea urchin.

Characteristics of Echinoderms * The internal skeleton of an echinoderm is made of _______________________. bony plates that are bumpy or spiny. * An echinoderm’s water vascular system is _________________________________. a system of tubes that carry food and oxygen and remove wastes * The water vascular system also helps an echinoderm _____. move

Characteristics of Echinoderms tube feet * Echinoderms have __________. tube feet * An echinoderm’s tube feet are used for _________________________________. moving and for getting food

Starfish sea stars five or more tube feet * Starfish are also called ___________. sea stars * Starfish have __________ arms connected to a central body. five or more * On the bottom of the arms are hundreds of ___________ that look like suction cups. tube feet

Starfish * A starfish is able to re-grow its arms. http://www.youtube.com/watch?v=HG17TsgV_qI * A starfish uses its tube feet to move and to open its food.

Sea Urchins spines poisonous * Sea urchins have longer and sharper ________ that they use to protect themselves. spines * Some sea urchins have ________ spines. poisonous

Sea Urchins sea plants tube feet * Sea urchins have a mouth hidden under its body. * A sea urchin uses its five teeth to eat ____________. sea plants * A sea urchin is not very active. Sometimes, it does move slowly using its __________. When not moving it uses its feet to stick to the ocean floor. tube feet

Sea Cucumber Soft, oblong body Lacks arms Tube feet arranged in 5 rows

http://video. nationalgeographic http://video.nationalgeographic.com/video/animals/invertebrates-animals/other-invertebrates/weirdest-sea-cucumber/

Sand Dollars Filter feeders Burrow in the sand When it dies the soft parts decay, the internal skeleton is what remains.