Across
- 3. leucocytes (colorless).
- 4. a water like substance in blood.
- 6. a fluid carried by vessels to all parts of the body.
- 8. thick walled, elastic vessels.
- 9. when the heart works harder than usual.
- 10. thin walled vessels.
- 11. blockage of blood vessels to the brain.
Down
- 1. erythrocytes (biconcave in shape).
- 2. four different types.
- 5. contraction of the ventricles.
- 7. a muscular organ that pumps blood to all parts of the body.
- 8. reduction in the amount of RBCs. (haemoglobin.)
- 9. one complete contraction and relaxation of the heart.