Abeka 6th grade science ch. 2 section 2.7

Crustaceans

Arthropods with hard, crusty shells.

Chitin

What the shells of crustaceans are made of

Molt

Shed their shells

Head, thorax, and abdomen

The three main body regions

Ten legs

How many legs crustaceans have

Antennae

Four antennae with 1 pair of long ones and short ones

Compound eyes

On the ends of movable eye stalks that allow the animal to see in any direction it chooses

Gills

What most crustaceans use to breathe under water

Regenaration

When a missing part of a crustacean grows back

Plankton

Microscopic plants and animals

Crabs

Crustaceans with flat bodies, and two large pincers . They run sideways

Carapace

Single sturdy shell

Pea crab

Smallest crab

Japanese spider crab

Largest crab

Fiddler crab

Has one huge pincer

Ghost crab

Its coloring is so similar to the color of the sand that it is difficult to spot at night

King crab and blue crab

Popular seafood

Hermit crab

Lives in snail shells

Lobster

Thick and muscular tail sticking out behind its narrow body

Swimmerets

Leglike limbs that help a lobster swim and walk on the ocean floor

Spiny lobster and rock lobser

Has no pincers, but extremely long antennae with sharp edges

Crayfish

Found in a lake, pond, stream, or drainage creek

Shrimp

Look like miniature lobsters

Prawns

Ten inch shrimps

Pistol shrimp

Has one large pincer that it uses as a type of stun gun

Barnacle

Makes its home on an object

Wood louse

Lives on land in moist places under leaves and stones

Pill bug

Also called roly- poly from the way it rolls itself into a ball

List four characteristics of crustaceans

Jointed appendages,segmented bodies,eco skeletons,and hard crusty shells

What term describes the process in which the crustacean sheds its exoskeleton to make room for it's expanding body?

Molting

What term describes the ability of crustaceans to replace lost body parts?

Regeneration

Which crustaceans run sideways?

Crabs

Name the hard, protective shell that shields a crabs soft body

Carapace

What do we call her leg like Limbs connected to a lobsters abdomen?

Swimmerets

Which lobster does not have pinchers?

Spiny lobster

What are the smallest shrimp mentioned in the text? What are the largest?

Sm. brine shrimp large .prawn shrimp

What crustacean lives in damp areas on the land?

Wood louse