Avengers of the Lab World!

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Across
  1. 2. blood flow stopper
  2. 3. relating to patient treatment
  3. 4. Steve's friend
  4. 8. Captain Steve
  5. 12. avian vision
  6. 14. circulating red liquid
  7. 15. venous target
  8. 16. electrolyte
  9. 17. fine tiny tubular metal
  10. 18. green stone
  11. 20. reds whites and platelets
  12. 21. thin fabric mesh
  13. 22. Universe of Superheroes
Down
  1. 1. movie theater
  2. 2. purple-tinged titan
  3. 5. great bravery
  4. 6. personal protection
  5. 7. stone bottled up by Thor
  6. 9. simple sugar
  7. 10. purple stone
  8. 11. forever rocks
  9. 13. science technology engineering math
  10. 14. Natasha's hue
  11. 16. system of knowledge
  12. 19. anticoagulant