Living Systems

123456789101112131415161718
Across
  1. 2. The bottom blood pressure number when the heart rests.
  2. 8. The yellow liquid part of blood that carries cells and nutrients.
  3. 11. Plant tissue that moves water and food around the plant.
  4. 12. The large vein that carries blood from the body to the heart.
  5. 14. Small tubes in the lungs that carry air to tiny air sacs.
  6. 15. Chemicals made by the body to fight specific germs.
  7. 16. Cells that control the opening and closing of leaf pores (stomata).
  8. 17. Natural substances in soil that help plants grow.
Down
  1. 1. The upper left chamber of the heart that receives oxygen-rich blood.
  2. 3. The movement of food (sugars) in a plant.
  3. 4. The lower right chamber of the heart that pumps blood to the lungs.
  4. 5. A hard substance that makes plant stems strong.
  5. 6. Tiny parts of blood that help stop bleeding.
  6. 7. Haemoglobin that has oxygen attached to it.
  7. 8. A device that helps control the heartbeat.
  8. 9. The upper right chamber of the heart that receives oxygen-poor blood.
  9. 10. The top blood pressure number when the heart beats.
  10. 12. Flaps in the heart or veins that stop blood flowing backwards.
  11. 13. Two large tubes that carry air from the windpipe into the lungs.
  12. 18. The lower left chamber of the heart that pumps oxygen-rich blood to the body.