Nasal Conchae (Nasal Turbinates) - The Respiratory System
Home / Uncategorized / Nasal Conchae (Nasal Turbinates)

Published on April 17th 2015 by under Uncategorized

Nasal conchae definition

Each of the two narrow, curled, spongy bones protruding from the nasal cavity walls in the human nose is referred to as nasal concha or nasal turbinate. Covered in thick mucus membrane, the nasal conchae are responsible for regulating the airflow through the nasal passages.

Nasal conchae structure

The three pairs of conchae on either side of the nasal cavity project horizontally into the breathing space, dividing it into the inferior, middle and superior meatuses and the sphenoethmoidal recess [2, 3]. Each pair, placed over and facing toward the corresponding meatus [4, 7], is identified by different names, depending on its location:

  • Inferior nasal concha: The largest and lowest of the three turbinate bones [10], the inferior concha or inferior turbinate is located on the septum, separating the two nasal cavities [11].
  • Middle nasal concha: As the name suggests, the middle nasal concha is the bone located between the superior and inferior conchae [8].
  • Superior nasal concha: It is the small, delicate seashell shaped bone located above the two other turbinates [5, 6].

The superior and middle turbinates both originate from the cranial region of the skull, being considered structural parts of the cranial bones [9].

Nasal Conchae

Nasal Conchae

Functions of the nasal conchae

The nasal conchae or turbinates are named this way because they function in a similar way as a turbine, being principally responsible for regulating the air flow during inhalation. The bones expand the surface area of the nasal cavity, allowing the air to come into better contact with the cavity walls. They also slow down the laminar flow of air through the breathing passages, so the air spends a longer time in the cavity in order to be dehumidified [3].

Another function of the nasal conchae is channeling the air entering the respiratory system to go through the mucous membrane and cilia to be filtered and warmed up properly [12].

The inferior conchae are primarily responsible for the above functions while the middle conchae create a protective shield over the sinuses. The superior turbinates serve to protect the olfactory bulb, the structure housing the smell receptors [13].

Nasal Turbinates

Nasal Turbinates

Conditions associated with nasal turbinates

Turbinate hypertrophy is an abnormal condition where the nasal turbinates become inflamed, swollen or enlarged, causing symptoms like breathing difficulty and nosebleeds [14, 15]. Possible causes include cold, flu, allergies, nasal polyps and certain hormonal imbalances [14].

There are various nasal decongestants, antihistamines and nasal steroids that can be used to treat the condition. However, severe cases may call for a surgical procedure for the reduction of the nasal turbinates [16].

References

    1. Dr. Henry Knipe and Dr. Jeremy Jones – Nasal Conchae Radiopaedia
    2. Nasal Turbinate Anatomy Get Body Smart
    3. The Nasal Cavity – Anatomy and Functions Teach Me Anatomy
    4. Henry Gray. Anatomy of the Human Body (1918) – Inferior Nasal Concha Bartleby
    5. Superior Nasal Conchae Location and Anatomy Inner Body
    6. Superior Nasal Conchae of the Ethmoid Anatomy Expert
    7. Henry Gray. Anatomy of the Human Body (1918) – The Organ of Smell Bartelby
    8. Dr. Yuranga Weerakkody and Dr. Jeremy Jones – Middle Nasal Conchae Radiopaedia
    9. Dr. Henry Knipe and Dr. Jeremy Jones – Inferior Nasal Conchae Radiopaedia
    10. Inferior Nasal Conchae Anatomy Inner Body
    11. Inferior Nasal Conchae Location and Structure KenHub
    12. Facial Bones Anatomy Boundless
    13. Nasal Turbinate Hypertrophy and Treatment Dr. Garrett Bennett NYCFaceMD
    14. Turbinate Hypertrophy University of Miami
    15. Turbinate Hypertrophy Diagnosis and Treatment Miami Ear, Nose, Throat Specialists
    16. Inferior Turbinate Hypertrophy Information Texas Sinus Center

3 responses to “Nasal Conchae (Nasal Turbinates)”

  1. alfa says:

    I like it , Very clear!

  2. Renee Vasquez says:

    Having surgery on enlarged turbinates. Do these tissues continue to grow dispite surgery? This is a 3rd surgery now in my sinus area.

  3. n r k rao says:

    one of my relative had a moderate nose bleeding.he says that slept 3 days back in his car to avoid sever cold by turning heater he was seen by a ent specialist he healthy with out any known deceases such as bp,liver,blood disorders etc.he advised ct scan.there is a trace of conjunctivitis { haemmorage}

Leave a Reply

Your email address will not be published. Required fields are marked *