| Term |
Description |
| vertebrate |
an animal w/ a backbone |
| invertebrate |
in animal w/ out a backbone |
| bilateral symmetry |
describes animals w/ body parts arranged in the same way on both sides of their body |
| radial symmetry |
describes animals w/ body parts arranged in a circle around a central point; similar to a bicycle wheel |
| sessile |
describes organisms, such as trees, that remain attached to one place during their lifetime |
| filter feeder |
an organism that obtains food & oxygen by filtering it from the water from which it lives |
| collar cell |
in sponges, the lining cells that help move through the sponge by beating of the flagella |
| regeneration |
the ability of an organism to replace body parts; a type of asexual reproduction in which a whole new organism grows from just a part of the parent organism |
| hermaphrodite |
an animal that produces sperm and egg |
| larva |
a young organism that develops between egg and adult stages |
| cnidarian |
a phylum of hollow-bidied animals w/ stinging cells |
| tentacles |
the arm- like structures that surround the mouth of some organisms and help them to capture food |
| polyp |
a vase shaped cnidarian that is usually sessile |
| medusa |
a bell shaped cnidarian that is free swimming |
| free living |
describes an organism that finds its own food and place to live w/ out depending on another organism; the opposite of a parasite |
| anus |
an opening at the end of the digestive tract through which solid wastes leave the body |
| cyst |
a young, parasitic worm w/ a protective covering |
Ch.18 LTI-MA 509
