Animal Diversity

Cnidaria

________ are divided into four main classes: cubozoan, scyphozoans, anthozoans, and hydrozoans.

Echinodermata

________ consists of starfish, sea cucumbers, and sea urchins.

Annelida

________ have bodies divided into segments, and those segments are divided by septa.

Chordata

________ have a notochord, pharyngeal slits, a post- anal tail, and an endostyle.

Platyhelminthes

________ have no body cavity, bilateral symmetry, are marine and freshwater flatworms, and have primitive sensory systems.

Filter feeders

________ are flagellated cells that produce constant water flow through the sponge.

Mollusca

________ have diverse body forms, a mantle that secretes the shell, and an open circulatory system (with the exception of cephalopods)

penta radial symmetry

They have ________, deuterostomes, derma gills to respire by diffusion, oral and aboral sides, and a water vascular system consisting of water filled canals ending in tube feet topped with ampullae for locomotion.

Cnidarians

Diploblastic means the animal has two germ cell layers, such as ________.

Animals

________ are either diploblastic or triploblastic.

tracheal tubes

They have an external skeleton, jointed appendages, gills for respiration (crustaceans), ________ and spinal openings (insects), and an open circulatory system.

radial symmetry

They have ________ and are usually marine carnivores.

Porifera

________ are heterotrophs, asymmetrical, have various cell types, no distinct organs, and filter feeders.

ectoderm

The ________ is the outermost layer, the endoderm is the innermost layer, and the mesoderm is the middle layer.

Germ layers

________ are initial embryonic tissue layers.