The esophagus and the larynx are the two channels that originate in the pharynx. The larynx connects to the wind pipe (trachea) and the esophagus connects to the stomach via of the cardiac valve. The epiglottis is a small flap-like structure that protects the larynx (your ability to breathe) when you swallow/eat/drink.
The Pharynx.
The pharynx is common to both the respiratory pathway ( pharynx -> larnyx -> trachea -> pulmonary bronchi ) and the digestive pathway ( pharynx -> esophogus->stomach).
The Pharynx.
The esophagus receives food and the larynx receives air. Since esophagus lies behind the larynx, the food and the air passage are said to cross in the pharynx.
Aquaporins.
2
Air must pass from the back to the front of the pharynx to enter the trachea and food must pass from the front to the back of the esophagus
Seven passage ways connected with the pharynx are the larynx, trachea, 2 Eustachian tubes, 2 sinuses and the mouth or buccal cavity.
There is a way you can put 4 speakers on 2 channels. You can also put 2 subs on 2 different channels.
The ORAL CAVITY: Mouth, Tongue, Pharynx,
Pharynx
The pharynx is the back of the throat (divided loosely into nasopharynx and oropharynx) which allows food to enter the oesophagus and air to enter the thrachea.