1. 4th 6 Weeks Vocabulary Word Wall

2. Cell Theory

3. Extract
a substance made by extracting a part of a raw material, often by using a solvent such as ethanol or water.

4. Organ
A group of tissues that perform a specific function or group of functions.

5. Organ System
A group of organs that work together to carry out a particular task.

6. Organism
a living things that contributes to the ecosystem.

7. Tissue
a group of cells that perform a similar function

8. Cell Membrane
membrane around cell: the membrane that surrounds the cytoplasm, through which substances pass in and out of the cell

9. Cell Wall
the tough, usually flexible but sometimes fairly rigid layer that surrounds some types of cells.

10. Chloroplast
organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis.

11. Cytoplasm
small gel-like substance residing between the cell membrane holding all the cell's internal sub-structures (called organelles), except for the nucleus.

12. Nucleus
central part of living cell: the central body, usually spherical, within a eukaryotic cell, that is a membrane-encased mass of protoplasm containing the chromosomes and other genetic information necessary to control cell growth and reproduction

13. Mitochondria
a small round or rod-shaped body that is found in the cytoplasm of most cells and produces enzymes for the metabolic conversion of food to energy

14. Organelle
a specialized part of a cell that has its own function

15. Vacuole
A small cavity in the cytoplasm of a cell, bound by a single membrane and containing water, food, or metabolic waste.

16. Radiant Energy
Energy transferred by radiation, especially by an electromagnetic wave

17. Photosynthesis
the process of converting light energy to chemical energy and storing it in the bonds of sugar.

18. External
of or pertaining to the outside or outer part;

19. Fight or Flight
A set of physiological changes, such as increases in heart rate, arterial blood pressure, and blood glucose, initiated by the sympathetic nervous system

20. Geotropism
The growth of a living organism in response to gravity,

21. Hydrotropism
movement influenced by water: movement by a plant part such as a root toward or away from a source of water

22. Phototropism
the growth of a plant in the direction of its light source.

23. Response
any behavior of a living organism that results from an external or internal stimulus.

24. Stimulus
Something causing or regarded as causing a response

25. Thigmotropism
a movement in which an organism moves or grows in response to touch or contact stimuli.

26. Equilibrium
the condition of a system in which competing influences are balanced.

27. Homeostasis
a state of equilibrium or a tendency to reach equilibrium, either metabolically within a cell or organism or socially and psychologically within an individual or group

28. Internal
located inside: located within or affecting the inside of something, especially the inside of the body

29. Wilting
droop or shrivel: to droop or shrivel through lack of water, too much heat, or disease, or make a plant droop or shrivel

30. Emergence
The act or process of emerging

31. Turgor Pressure
the main pressure of the cell contents against the cell wall in plant cells and bacteria cells