Across
- 3. Energy production using oxygen inside cellular mitochondria.
- 5. Cellular process of extracting energy from food.
- 6. Swapping fresh inhaled oxygen for waste carbon dioxide in blood.
- 8. Body control center consisting of the brain and spinal cord.
- 9. Respiration Oxygen-free energy release that produces lactic acid in muscles.
- 10. System of heart and blood vessels pumping blood around the body.
- 12. Body's capacity to transport and utilise oxygen during long exercise.
- 14. Microscopic blood vessels supplying oxygen directly into muscle fibers.
- 15. Heart Rate Number of heartbeats per minute measured when fully relaxed.
Down
- 1. Microscopic air sacs in the lungs where gas swap occurs.
- 2. Structured, repeatable physical workouts designed to build fitness.
- 4. Blood that has released its oxygen to working body tissues.
- 7. Combined body system of the heart and respiratory system delivering oxygen to muscles.
- 11. Automatic, protective muscle response handled by the spinal cord.
- 13. Volume Volume of blood pumped out with a single beat of the heart.