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Across 4. A Blood clot is dissolved by which enzyme 5. Blood contains cells, fibrous proteins and plasma. What type of tissue is it? 8. Function of the leucocytes 11. Process of blood cell production occuring in the bone marrow 12. Large cell platelets are derived from 14. Leucocyte responsible for mild uticaria or life threatening anaphylaxis 15. Serotonin induces what reaction from a blood vessel 17. Leucocyte with a charactristic multi-lobed nucleus 18. Smallest of the leucocytes 20. Shape of a red blood cell 21. Term for white blood cells 22. What cell organelle is absent from a mature red blood cell 23. Process which stems blood loss and repairs damaged vessels

Down 1. One function of blood 2. Proteins responsible for activating fibrinogen and promoting clot formation (11, 7) 3. Monocytes leave blood and enter the tissues to become what type of cell? 4. Type of stem cell all blood cells arise from 6. Term for red blood cells 7. Oxygen is bound to this 9. Formation of the red blood cell lineage 10. Liquid component of blood 13. Leucocyte with a defence role against parasites 16. Often referred to as platelets 19. Leucocyte with a horse shoe or kidney shaped nucleus