Answer:
sign of infection
Explanation:
Purulent drainage is a type of fluid that is released from a wound. Often described as being “milky” in appearance, it's almost always a sign of infection.
D because trachea is the tube, bronchi is what splits into your lungs, bronchioles are what look like branches of the bronchi, and alveoli are the little air bags at the bottom of the smallest bronchioles.
The largest artery is the <em><u>aorta</u></em>.\
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