The Animal Kingdom

arthropods

fish

animal with a backbone.

birds

cold-blooded vertebrates that live on land and have dry skin.

______and oysters are both mollusks.

Humans, elephants, and whales are all____

____have mouths that act like suction cups.

mollusks

flatworms, roundworms, and segmented worms.

invertebrates with soft bodies and a shell.

skeleton inside the body.

skeleton outside the body

The four groups of arthropods are centipedes and millipedes, arachnids, insects, and_______.

worms

reptiles

warm-blooded vertebrates with fur or hair.

cnidarians

mammals

Body temperature doesn’t change much.

animal without a backbone.

invertebrates with jointed legs, bodies that are divided into sections, and exoskeletons.

invertebrates with endoskeletons and spiny skin.

simplest kind of invertebrate.

echinoderms

invertebrates with arm-like parts called tentacles.

cold-blooded vertebrates that spend part of their life in water and part on land.

amphibians

____have skin that is covered by scales or plates that keep moisture in.

warm-blooded vertebrates with feathers.

cold-blooded vertebrates that use gills to breathe.

sponges

body temperature changes with the surroundings