Btec sport

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Across
  1. 1. — fluid that carries oxygen and nutrients throughout the body.
  2. 3. — decrease in the size of an organ or tissue.
  3. 6. — tiny air sacs in the lungs where gas exchange occurs.
  4. 7. — amount of blood pumped by the heart per beat.
Down
  1. 2. — gas essential for respiration.
  2. 4. — number of heartbeats per minute.
  3. 5. — relating to exercise that requires continuous oxygen use.