Across
- 3. Relating to or derived from living matter.
- 5. made by chemical synthesis, especially to imitate a natural product.
- 7. The lightest element on the periodic table
- 9. A small round mass of solid medicine to be swallowed whole.
- 10. A regular cycle occuring approximately every 28 days where the uterus sheds its lining
- 11. Element that constitutes 21% of the Earth's atmosphere
Down
- 1. Relating to chemistry, or the interactions of substances as studied in chemistry.
- 2. A synthetic form of progesterone
- 4. The 6th element on the periodic table
- 5. Structure of 17 carbon atoms arranged in four rings
- 6. A regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.
- 8. A medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body.