Across
- 3. – Pig pancreas was the first source of this hormone (7)
- 6. – Fat rendered from cattle, once used in soap & candles (6)
- 7. – A waxy byproduct of sheep’s wool, used in cosmetics (7)
- 9. – Found in feathers and hooves, used in shampoos (7)
Down
- 1. – Fertilizer made from animal bones (8)
- 2. – Extracted from shellfish, used in medicine (8)
- 4. – Gas from manure used as renewable energy (6)
- 5. – Protein extracted from hides, used to make gelatin (8)
- 8. – Enzyme from calves’ stomachs, used in cheese-making (6)