Respiration Anatomy

What are the two entrances for oxygen to enter the respiratory system? Nose and the mouth
Where does the air go to from the nose and mouth? To the trachea and pharynx
In between the pharynx and the trachea what structure does this lesson leave out? The esophagus
Where is the trachea located in reference to the esophagus? anterior
What structures moisten the air in the Respiratory System? The mouth and nose
What is the name for the small air sacs at the end of the bronchioles? alveoli
Where does gas exchange take place in the lungs? alveoli
What is the main muscle of respiration? The diaphragm
What happens when we inhale? Exhale? When inhaling the diaphragm pulls on the pleural sacs causing the air between the sacs and the lungs to thin out. That causes the pressure in the lungs to decrease causing air to be pulled into the lungs. When the diaphragm relaxes, it pushes on the pleural sac causing an increase of pressure within the lungs which forces air out of the lungs.
Sketch a picture of the respiratory system. Include the following structures: nose, mouth, pharynx, larynx, trachea, bronchus, bronchioles, alveoli and lungs.