Question

Pharynx is connected with tympanic cavity through
A. Glottis
B. Gullet
C. Eustachian tubes
D. Internal nares

Answer 1

It is a narrow passageway that leads our throat to the middle ear. When we sneeze, chew, or yawn, these tubes open up.

Complete answer:
- The pharynx is present between the mouth and the nasal cavity, just behind the esophagus and larynx - the openings of the stomach and the lungs. It is the part of the throat. It is present in invertebrates and vertebrates, but its function differs across species.
- The tympanic cavity is an air-filled chamber surrounded by bone, detached from the external ear through a thin tympanic membrane and in close contact with the pharynx by the auditory tube.
- The larynx, usually referred to as the voice box or glottis, is the airway between the pharynx above and the trachea below. It stretches from the fourth to the sixth vertebral stage.
- The esophagus is also known as the gullet. It's a muscular tube that binds our mouth to our stomach.
- The tympanic cavity has direct contact with the pharynx through the auditory tube, also known as the eustachian tube. The Eustachian tube is a narrow passageway that leads our throat to the middle ear. When we sneeze, chew, or yawn, our Eustachian tubes open up. This prevents air pressure and fluids from piling up inside our ears.

Thus, the correct answer is option C. i.e., Eustachian tubes.

Note: In humans, pharynx is part of the digestive system and the conductive region of the respiratory system. The human pharynx is usually divided into three sections: oropharynx, nasopharynx, and laryngopharynx. It's also necessary for vocalization. In humans, two sets of pharyngeal muscles form the pharynx and determine the shape of the pharynx. They are organized as an inner layer of longitudinal muscles and a spherical outer layer.