“Respiratory Tracts – Upper and Lower”
The respiratory system is composed of two sections: upper respiratory tract and lower respiratory tract. The respiratory system consists of the following structures:
Upper Respiratory Tract
# Nose
# Nasal Cavity
# Pharynx
# Epiglottis
# Larynx
Lower Respiratory Tract
# Trachea
# Bronchi
# Bronchioles
# Lungs
# Alveoli
