Tongue: Anatomy, Muscles, Neurovasculature And Histology

Tongue: Anatomy, Muscles, Neurovasculature And Histology

Describe the development of the tongue in brief and correlate the nerve supply of the tongue with its development.
Answer.

• The tongue develops in the floor of the primitive pharynx from the 1st, 2nd, 3rd, and 4th pharyngeal arches.
• The epithelium, muscles, and connective tissue of the tongue develop as follows.

Tongue Development Epithelium The epithelium of the tongue develops from four swellings:

Correlation of Nerve Supply of Tongue with Its Development

The various parts of the tongue develop from above-mentioned four swellings as follows:

• Epithelium of the anterior two-thirds of the tongue develops from two lingual swellings and tuberculum impair derived from 1st arch. The contribution from tuberculum impact is insignificant.
• The epithelium of the posterior one-third of the tongue develops from the cranial (anterior) part of the hypobranchial eminence, derived from 3rd arch.
• The epithelium of the posteriormost part develops from the caudal (posterior) part of the hypobranchial eminence derived from the 4th arch.

Muscles The muscles of the tongue develop from occipital myotomes.

Connective tissue The connective tissue of the tongue develops from local mesenchyme.