Answer:The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.
Explanation:
I think its the left one (sorry if im wrong)
The epiglottis covers the larynx to prevent food from entering the lungs.
Proteins are made up of a chain of 20 amino acids
c my brotha y'w prob alr took da quiz