The lingual septum consists of a vertical layer of fibrous tissue, extending throughout the entire length of the median plane of the tongue, though not quite reaching the dorsum.It is thicker behind than in front, and occasionally contains a small fibrocartilage, about 6 mm. in length.It is well displayed by making a vertical section across the organ.
Superior longitudinal- fibrous tissue near epiglottis, hyoid and median fibrous septum to lateral margins of tongue and region of apex.Inferior longitudinal-root of tongue and corpus hyoid to tip below verticalis and transversus (apex of tongue)
anterior surface of soft palate through faucial pillar (anterolateral palatal aponeurosis) to posterolateral tongue body (sides of posterior tongue
Parts of the Tongue
Located between the hyoid bone and
Dorsal portion sits in the oropharynx.
Attaches the tongue to roof of the
Makes up the anterior two-thirds of the
Rough surface due to the lingual
Surrounded by anterior and lateral
Mobile portion of the tongue.
Also known as the tip, is the anterior
one-third of the anterior tongue surface.
Rests against the incisor teeth.
MUSCLES OF TONGUE
A median fibrous septum divides the tongue into Rt. & Lt.
halves. Each half contains 4 intrinsic & extrinsic muscles.
Intrinsic muscles Extrinsic muscles
Occupy the upper part of tongue and attached to the
submucous fibrous layer and to median fibrous
Alter the shape of tongue.
4 in no. they are
1. Superior longitudinal
2. Inferior longitudinal
beneath the mucous membrane.
Shortens the tongue.
Make dorsum concave.
Lying close to inferior surface of
tongue between genioglossus
Shortens the tongue.
Makes its dorsum convex.
Extend from median septum to
Makes the tongue narrow and
Found at the borders of anterior
part of tongue it make tongue
broad & flattened.
Oral surface of palatine
Descends in the
Palatoglossus arch to the
side of tongue at junction of
its oral and pharyngeal
Pulls up the root of
tongue, approximates the
Palatoglossus arches and
thus closes the
Tip of tongue-
Drains bilaterally to the
sub mental nodes.
Ant. Rt. & lt. 2/3 drains
unilaterally to the
Few central lymphatics
drains bilaterally to same
Post. 1/3 drains bilaterally
to the jugulo-omohyoid
Taste buds are sensory organs that are found on
your tongue and allow you to experience tastes that are
sweet, salty, sour, and bitter
The sense of taste called gustation.
10,000 taste buds are present in its papilla.
A papilla contains few to 100 taste buds.
Location of Taste Buds
Taste buds contains sensory receptors found in the
papillae of tongue and widely distributed in the
epithelium of tongue, soft palate, pharynx and
The majority of taste buds on the tongue sit on raised
protrusions of the tongue surface called papillae.
Function of Tongue