An internal skeleton usually made of bone and cartilage
What is Endoskeleton?
Organisms with a backbone
What is a vertebrate?
Hallow ball of cells that form after fertilization of the zygote
What is a blastula?
Type of symmetry found in sponges
what is asymmetrical?
The three phyla in the animal kingdom that contain worms are roundworms, flatworms, and ________________
What are segmented worms?
A support structure in many soft bodied animals. Ex: Jellyfish
What is a Hydroskeleton?
All vertebrates belong to the Phyla __________
What is Chordata?
Most animals have _____(#)______ germ layers
what is three?
Name of the opening found in sponges. Where waste products are ejected.
What is the osculum?
Type of symmetry found in worms.
What is bilateral symmetry?
Animals without the ability to produce their own food.
What is heterotroph?
Have the ability to regulate body temperature through metabolism.
What is endothermic animals?
The middle germ layer that forms muscle and circulatory systems.
What is the mesoderm?
Sponges do not have digestive systems, instead they have this structure.
What are collar cells?
The type of digestion worms use because they do have a digestive system to break down food.
What is extracellular digestion?
Animals consisting of a center midline, dividing them into two mirror image halves
What is bilaterally symmetrical?
Ectothermic animals use ________ to maintain an optimum body temperature.
What is behaviors?
The outer most germ layer that forms the outer layer of the organisms body
What is the ectoderm?
The two forms of cnidarians. Examples include sea anemones and jellyfish.
What are polyp and medusa?
Some worms are termed to be _________________, because they contain both male and female reproductive systems.
What is hermaphrodites?
Animals can either be mobile or _______ (immobile)
What is sessile?
Organisms that belong to the other 30 Phyla and do not have a backbone
What are invertebrates?
Concentration of sensory organs typically found in bilaterally symmetrical animals.
What is cephalization?
Nerve network found in cnidarians.
What is a nerve net?
Sensory organs that send information to the nerve cells of worms is called _____________
What is the ganglia?