1.
organism without vertebrae
2.
organism with vertebrae
3.
organims with dorsal, hollow nerve cord
4.
organisms maintain an internal balance or equilibrium
5.
body parts that extend outward from the center
6.
imaginary plane that divides right and left sides with mirror images of each other
8.
lining of digestive tract and respiratory system
9.
develops into muscles, circulatory, reproductive, excretory systems
10.
develops into the nervous system and outer layer of skin
11.
body cavity with a fluid-filled space between the digestive tract and body wall with internal organs
12.
extensions on the outside of the body
13.
sense organs on anterior end called the head
