Across
- 3. Muscles feel tired and weak
- 5. Widening of blood vessels to allow more blood flow
- 8. Breathing becomes quicker to meet oxygen demand
- 9. Feeling of needing air due to oxygen shortage
Down
- 1. Heart beats faster to supply oxygen to muscles
- 2. Waste product formed during anaerobic respiration
- 4. Involuntary muscle contraction causing pain
- 6. Body response to regulate temperature
- 7. Muscle soreness after unfamiliar or intense exercise