Across
- 5. located or placed just beneath the skin
- 6. specific heritable characteristics
- 7. organism plant or animal that a parasite lives on
- 8. entering by of vein
- 11. large enough to be perceived
- 13. blood vessels which carry blood toward the heart
- 14. blood vessels which carry oxygenated blood away
Down
- 1. windpipe which transfers air to and from the lungs
- 2. too small to see with unaided eye
- 3. injection of killed microbe
- 4. breakdown of carbohydrates
- 9. female reproduction organ where eggs are produced
- 10. poison or venom
- 12. male organ which produces sperm