basic respiratory

What are the two entrances for oxygen to enter the respiratory system?
Answer: nose and mouth

Where does the air go to from the nose and mouth?
Answer: trachea and pharynx

In between the pharynx and the trachea what structure does the lesson leave out?
Answer: esophagus

Where is the trachea located in reference to the esophagus?
Answer: anterior

What structures moisten the air in the respiratory system?
Answer: mouth and nose

What is the name for the small sir sacs at the send of the bronchioles?
Answer: alveoli

Where does gas exchange takes place in the lungs?
Answer: capillaries

What is the main muscle of respiration?
Answer: diaphragm

What happens when we inhale and exhale?
Answer: diaphragm exhales and relaxes.