Answer:
Serous, Serosanguineous, sanguineous, purulent
Step-by-step explanation:
Drainage can be (1) serous (clear and thin; may be present in a healthy, healing wound),
(2) serosanguineous (containing blood; may also be present in a healthy, healing wound),
(3) sanguineous (primarily blood),
(4) purulent (thick, white, and pus-like; may be indicative of infection and should be cultured)