Upper respiratory tract
Conducting passages.

The upper respiratory tract refers to the following parts of the respiratory system:

• nose
• oral cavity
• throat
  • pharynx
  • larynx
  • trachea

The upper respiratory tract begins with the nose and oral cavity, and ends at the branching of the trachea into two bronchi. The upper respiratory tract is part of the conducting zone.

Upper respiratory tract infections are amongst the most common infections in the world.

[edit] External links

• Image at rsdrx.com