Answer:
13. Hypo is the prefix, means below
14. -pathy means disease
15. -ology means study of
16. Peri - around
cardium - concerning the heart
17. Hypertension
18. can't see the entire question
19. correct
20. correct
21. correct
22. correct
23. Most commonly used: O (can be any of the others, a, e, I, u).
24. Pulmonology means study of the respiratory system
25. Prognosis is the likely outcome of a disease/condition
26. Intravenous means inside the veins
27. Ileum is part of the small intestine between the jejunum and colon
28. Macrocyte means large cell.
Corrected some of your mistakes. Hope you don't mind.