Blood composition and RBC

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Across
  1. 1. Liquid part of blood making up 55% of blood content
  2. 3. Organ that releases erythropoietin in response to low oxygen
  3. 4. An excess waste product from broken down hemoglobin
  4. 6. Iron-containing part of hemoglobin molecule
  5. 8. The percentage of blood volume occupied by red blood cells
  6. 10. The most abundant type of blood cell in healthy humans
  7. 13. Blood is this type of tissue
  8. 14. Hormone produced by kidneys to stimulate red cell production
  9. 16. Hemoglobin binds to how many oxygen molecules
  10. 17. The organ involved in iron recycling from old red cells
  11. 19. Main gas carried from tissues to lungs by red blood cells
  12. 20. Clinical meaning of a low hematocrit
Down
  1. 2. Organ where senescent red blood cells are primarily destroyed
  2. 5. Leukocyte that provides specific immune defense
  3. 7. Major protein in red blood cells that carries oxygen
  4. 9. The process of breaking down red blood cells
  5. 11. The cell stage immediately before the mature erythrocyte
  6. 12. Place where erythropoiesis occurs
  7. 15. Blood cell particle involved in blood clotting
  8. 16. How many iron molecules are there in hemoglobin
  9. 18. Approximate lifespan (in days) of a normal human red blood cell