Understanding Ear, Nose and Throat Anatomy with Images

Anatomy of the Ear

The ear is a complex structure made up of three main parts: the outer ear, middle ear and inner ear. Understanding the anatomy of each part is important for diagnosing and treating various ear conditions.

Outer Ear

The outer ear consists of the pinna and the ear canal. The pinna is the visible part of the ear that sits on either side of your head. It collects and funnels sound waves into the ear canal. The ear canal is a tunnel running from the pinna to the eardrum. It is lined with tiny hairs and glands that produce earwax, which protects the deeper structures.

Middle Ear

The middle ear contains three tiny bones called ossicles that transmit sound waves to the inner ear. The three ossicles are the malleus, incus and stapes, often referred to collectively as the hammer, anvil and stirrup for their distinctive shapes. The opening of the Eustachian tube also connects the middle ear to the back of the nose and helps maintain equal air pressure across the eardrum.

Inner Ear

Encased in solid bone, the inner ear contains the cochlea and vestibular system, which are responsible for hearing and balance. The cochlea is a snail-shaped cavity filled with fluid and lined with sensitive hair cells that convert sound vibrations into nerve signals. The vestibular system includes three looping semicircular canals that detect head motion.

Inside the Nose

The nose is divided into two nasal passages separated by the nasal septum. Each nasal passage is lined with mucus membranes and contains structures critical for breathing, smelling and filtering air.

Turbinates

The curved bones protruding from the side walls of the nasal passages are called the nasal conchae or turbinates. The turbinates help warm, humidify and filter air as it passes through to the back of the nose. There are three turbinates in each nasal passage.

Nasal Septum

The nasal septum is the rigid wall made of bone and cartilage that separates the two sides of the nose. It can be slightly deviated, or off-center, which can block airflow and require septoplasty surgery to straighten.

Olfactory Region

The olfactory region is the area at the top of each nasal passage containing special olfactory cells for smelling. Also called the olfactory epithelium, this area sends smell information from inhaled air to the brain by way of the olfactory nerves.

Throat Anatomy

The throat, or pharynx, is a 5-inch tube that connects the back of the nose to the esophagus and larynx. It serves as a passageway for air and food and helps modulate voice.

Nasopharynx

The nasopharynx is the uppermost part of the throat behind the nose. This is where the Eustachian tubes connect to drain ear fluid. The adenoids are also in this area.

Oropharynx

The middle section of the throat containing the tonsils is called the oropharynx. There are tonsil beds on each side where the palatine tonsils reside. The oropharynx squeezes shut when you swallow to prevent food or liquid from entering the airway.

Laryngopharynx

The laryngopharynx is the lower part of the throat connecting to the esophagus and larynx (voice box). The epiglottis folds down over the larynx when swallowing to guide the food into the esophagus instead of the trachea.

Having a basic visual understanding of ear, nose and throat anatomy is helpful when following your provider's descriptions of affected areas and treatment plans.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.