respiratory – adj. of or relating to breathing or the organs of the body that are used in breathing

appreciate – v. to understand the worth or importance of (something or someone)

blood clotting – n. a thick and sticky piece of dried blood that stops blood from flowing through a blood vessel in a person or an animal

inflammation – n. a condition in which a part of your body becomes enlarged and painful

ventilator – n. a machine for helping a person to breathe

function – n. the special purpose or activity for which a thing exists or is used

anecdotal – adj. used to describe a story about an interesting event

persistent – adj. continuing firmly

symptom – n. a physical or mental condition which is considered a sign of disease

stairs – n. a series of steps leading from one floor to another