Download Four How many chambers does a heart have

B1 Revision
Across
8. Steroids are placed in which drug category? (11, 9)
12. Used in aerobic respiration.
14. Keeping internal environments stable.
19. A sun tan is an example of an _____ characteristic.
21. Enzymes which break down proteins
23. Product of aerobic respiration.
26. Food group which includes sugar and starch.
28. Features passed down from our parents are called ____
characteristics.
30. Which part of the eye lets in light?
Down
1. Blood which does not contain oxygen is called ___________.
2. Scientific word for food pipe.
3. Produced during anaerobic respiration. (6, 4)
4. Messages can be sent through the body using chemicals called ______.
5. Which part of the eye contains light receptive cells?
6. When a reflex arc is used, the body responds without using this.
7. Type of digestion caused by teeth/ stomach movements.
9. Athletes’ foot is caused by this type of micro-organism.
10. How many chambers does a heart have?
11. White blood cells release these to fight disease.
13. If you are free from disease, you are _____.
15. The axon of a neurone is surrounded by a ____ ____ (6, 6)
16. Where oxygen enters your blood stream.
17. Needed in the diet to help keep you ‘regular’.
18. Alcohol is a d_________.
20. Organ which detects smell.
22. Chemicals which help break down food.
24. Air sacs in the lungs.
25. Which organ produces testosterone?
27. When we are hot, blood vessels near the skin d_____.
29. This type of gene will only be expressed if no dominant genes are
present.