GRADE 8 SCIENCE - CELLS

ACROSS

4. that can be easily permeated or penetrated (by air of water, for example)

5. small structure inside a cell, performs specific function to meet cell’s basic needs
 (to survive & reproduce)

6. (e.g. bacteria, amoebas, algae & fungi)

7. tissue covering the body & internal organs; lines the inside of some organs (small intestine)

8. system made up of the mouth, salivary glands, esophagus, stomach, liver, gall bladder,
 pancreas & intestines

10. system made up of several glands that produce hormones

12. folded organelle in a cell that makes proteins

13. large, sac-like organelle that stores excess food, waste & other substances
 required by the cell

15. building block of life

17. movement of particles from an area of higher concentration to an area of lower concentration

20. system made of kidneys, ureters, bladder & urethra; filters blood & removes liquid waste
 & extra H20

21. group of specialized cells in an organism that have similar structure & function

22. system (nose, trachea, lungs, throat, larynx & bronchi) allows oxygen to enter the body
 & waste CO2 to exit

23. system made up of brain, spinal cord & nerves

24. tissue that supports & connects parts of the body (blood, fat, cartilage, tendons, bone)

25. mass of cells that continually, reproduce but are otherwise non-functional







DOWN

1. mitosis, a cell divides into two new cells

2. that cannot be passed through (by air or water, for example)

3. diffusion in which a fluid (usually H2O) moves through a selectively permeable membrane

9. system made up of bones & cartilage; provides support for movement,
 attachment points for tissues

11. system made up of skin hair, nails & sweat glands.

14. plant cell organelle, contains chlorophyll, uses Sun’s energy to convert CO2 & H20
 into sugar & oxygen (photosynthesis)

16. system responsible for destroying & removing invading organisms & abnormal cells

18. large organelle, controls all cell activities (growth, repair & reproduction)

19. jelly-like material that fills the cell & surrounds the organelles; contains nutrients
 the cell needs to survive