Muscles and Oxygen Core Terms

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Across
  1. 1. Composed of the heart and blood vessels; responsible for transporting oxygen to working muscles
  2. 4. When the body can't supply oxygen fast enough during the start of intense activity
  3. 10. Organelles in muscle cells where oxygen is used to produce ATP
  4. 12. muscle cells that contract to create movement and require oxygen to function efficiently
  5. 14. A protein in red blood cells that carries oxygen from the lungs to muscles
  6. 17. Oxygen needed after exercise to restore the body to a resting state
Down
  1. 2. Energy production without oxygen; used in short bursts of intense activity
  2. 3. Essential for producing energy in muscle cells, especially during aerobic activity
  3. 5. Tiny blood vessels surrounding muscle fibers that deliver oxygen and remove waste
  4. 6. A muscle protein that stores and transports oxygen to mitochondria
  5. 7. The amount of blood pumped by the heart per beat
  6. 8. The period muscles need post-exercise to return to normal, aided by oxygen supply
  7. 9. The energy molecule muscles use to contract; oxygen helps produce it efficiently
  8. 11. Energy production in cells using oxygen supports endurance activity
  9. 13. A byproduct of anaerobic metabolism when oxygen supply is limited
  10. 15. The maximum rate at which the body can use oxygen during exercise, a key fitness measure
  11. 16. The ability to sustain physical activity, heavily dependent on efficient oxygen use
  12. 18. The amount of oxygen used by the body