Solve these clues to fill the grid.
- The state of being covered with unclean things
- 3 Across
- Used with water to wash
- 5 Across
- Tiny single-celled living things, some of which cause illness
- 6 Across
- To communicate a disease to
- 10 Across
- Part of an organism consisting of an aggregate of cells having a similar structure and function
- 11 Across
- A small apparently simple structure from which new tissue can develop into a complete organism (plural)
- 1 Down
- Clear liquid we drink that falls as rain
- 2 Down
- A regulator for controlling the flow of a liquid from a reservoir
- 4 Down
- The event of something coming in contact with the body
- 7 Down
- Impairment of normal physiological function affecting part or all of an organism
- 8 Down
- A symptom consisting of the involuntary expulsion of air from the nose
- 9 Down
- A natural protective body covering and site of the sense of touch
- 12 Down
