Pharynx

Definition

The pharynx is a muscular tube that serves as a passageway for both air and food. It connects the nasal and oral cavities to the larynx and esophagus.

5 Must Know Facts For Your Next Test

1. The pharynx is divided into three regions: nasopharynx, oropharynx, and laryngopharynx.
2. It plays a crucial role in respiration by directing air from the nasal cavity to the larynx.
3. The pharyngeal muscles are involved in swallowing.
4. It contains lymphatic tissues like the tonsils, which help in immune defense.
5. Eustachian tubes open into the nasopharynx, helping to equalize pressure between the middle ear and atmosphere.

Review Questions

• What are the three regions of the pharynx?
• How does the pharynx contribute to both respiratory and digestive systems?
• What role do the tonsils play within the pharynx?

Related terms

Larynx: A cartilaginous structure at the top of the trachea that houses the vocal cords.

Esophagus:

A muscular tube connecting the throat (pharynx) with the stomach.

Tonsils: Lymphoid tissues located in the pharynx that help trap pathogens.