Animal Kingdon

Sponges

Lack true tissues.

Cnidarians

Diploblastic with radial symmetry; use tentacles with cnidocytes containing nematocysts.

Nematodes

Ecdysozoans, pseudocoelomates.

Flatworms (platyhelminth)

Triploblastic with bilateral symmetry, gas exchange across the skin, dorsoventrally flattened acoelomates.

Segmented Worms

Annelids; coelomates with segmented body wall and internal organs.

Arthropods

Ecdysozoans with a segmented body, hard exoskeleton, and jointed appendages.

Hexapoda

Insects; wings are cuticle extensions, can undergo incomplete or complete metamorphosis.

Echinoderms

Deuterostomes and coelomates, such as sea stars.

Chordates

Have notochord, post-anal tail, and hollow dorsal nerve cord at some point in their lives.

Gnathostomes

Vertebrates with jaws and four sets of HOX genes.

Fishes

Can be ray-finned or lobe-finned.

Tetrapods

Gnathostomes with limbs and fused pelvic girdle.

Amphibians

Have aquatic larvae and terrestrial adults.

Amniotes

Tetrapods with a terrestrial adapted egg.

Reptiles

Most are ectothermic (absorb outside heat).

Birds

Endothermic animals that produce heat through metabolism.

Mammals

Amniotes with hair, mammary glands, and more involved in raising offspring.

Eutherians

A type of mammal, such as humans, that develop mostly in the uterus.

Primates

Have a large brain, short jaws, and forward-looking eyes for depth perception.

Humans

Bipedal primates sharing a common ancestor with apes.