crossword

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Across
  1. 2. blood vessel that carry oxygen rich blood
  2. 3. pumps blood into the blood vessels
  3. 5. the pull force between the particles are very weak
  4. 6. this type of vessels carry impure blood
  5. 8. is more in inhaled air
  6. 9. it carry nutrients and water to all parts of body
  7. 10. plants buried under the soil for years
Down
  1. 1. this kind of energy makes us feel warm or hot
  2. 4. the process by which food and oxygen combine to obtain energy
  3. 7. wind energy is converted to electrical energy by this machine