Ch 9 Vocab

2. Group of similar cells that perform a specific function.
4. Action that occurs as a result of a stimulus.
5. The inner framework made up of all the bones in the body.
9. Process when nutrient molecules pass through the digestive system's wall into the blood
11. Group of organs that work together to perform a major function.
12. A muscle attached to the bones that provides the force to move the bones.
14. Body tissue that contracts making body parts move.
15. Substance in food that provides energy needed for an organism to carry out its processes.
16. Thick fluid of a cell between the cell membrane and nucleus.
18. Basic unit of structure and function in living things.
20. Tissue that carries electrical messages back and forth between the brain and body.

1. Organelle that contains the cell's genetic material.
3. Tissue that provides support for the body and connects all its parts.
6. Chemical that affects growth and development.
7. Body structure made of different tissues that work together.
8. Thin barrier that surrounds the cell and decides what passes through and out.
10. Any change or signal in the environment that can cause a reaction.
13. Condition when an organism's internal environment is kept stable in spite of changes in the external environment.
17. Organ that produces and releases chemicals through the ducts or into the bloodstream.
19. Place where two bones come together.