| A | B |
|---|
| gizzard | This structure contains small pebbles that are used to grind up food in the earthworms digestive system. |
| esophogus | This structure acts as a passageway between the pharynx and the crop. |
| crop | This structure is where food is stored in the earthworm. |
| intestines | This structure is where digestion and absorption take place. |
| pharynx | This structure "sucks" food into the digestive tract. |
| reproductive | The clitellum is part of the ____ system |
| cell | The basic unit of life |
| tissue | A group of cells that work together to perform a job. |
| organ | Tissue that works together to perform a specific job |
| system | A group of organs that work together to perform functions |
| organism | a living thing that can carry out the processes of life independently |
| red blood cell | Carries oxygen throughout the body. |
| white blood cells | These cells help fight off infection. |
| skin cells | These cells help to protect the body. |
| bone cells | These cells work together to provide support for the body. |
| muscle cell | These cells allow for movement and flexibility within the body. |
| anterior | The front or head end of the earthworm |
| posterior | The back or rear end of the earthworm |
| dorsal | the top or "back" of the earthworm |
| ventral | the belly or bottom of the earthworm |
| control group | The part of the experiment that you do NOT change. |
| dependent variable | The part of the experiment that you measure. |
| independent variable | The part of the experiment that you DO change. |
