Across
- 1. Contraction where a muscle lengthens
- 4. Contraction where the muscle stays the same length
- 7. Muscle type responsible for voluntary movement
- 8. Muscle fibres suited to longer duration activities: ... twitch
- 11. Muscle type found specifically in the heart
- 12. Muscle that relaxes while the agonist contracts
Down
- 2. Contraction where a muscle shortens
- 3. Receives oxygen from haemoglobin and delivers it to the mitochondria
- 5. Muscle fibres used for power, speed and strength: ... twitch
- 6. Colour of white twitch muscle fibres
- 7. Involuntary muscle found in organs and blood vessels
- 9. Colour of red twitch muscle fibres
- 10. The prime mover that causes a movement