2. Lymphatic system is part of the defense system
against microorganisms and other substances.
It helps to maintain fluid balance in tissues
and to absorb fats from the digestive tract.
Functions:
Fluid balance
Fat absorption
Defense
3. The lymph nodes of the
head and neck are
arranged as a regional
collar that extends from
below the chin to the
back of the head and as
a deep vertical terminal
group that is embedded
in the carotid sheath in
the neck.
5. Node Location Structures drained
Occipital Occipital bone on Back of the scalp
the back of the skull
Retroauricular Behind the ear over Scalp over the ear,
(mastoid) the mastoid process the auricle, and
Parotid On or within the Scalp above the
parotid salivary parotid gland, the
gland eyelids, the parotid
gland, the auricle,
and the external
auditory meatus
6. Node Location Structures drained
Buccal (facial) Cheek over the Drain the lymph
buccinator muscle that ultimately
passes into the
submandibular
nodes
Submandibular Lie superficial to the Front of the scalp, the
nodes submandibular nose, the cheek, the
upper lip, the lower lip
gland just below the (except the central
lower margin of the part), the frontal,
jaw maxillary, and ethmoid
sinuses, the upper and
lower teeth (except the
lower incisors), the
anterior 2/3s of the
tongue, the floor of the
mouth and vestibule,
and the gums
7. Node Location Structures drained
Submental Submental triangle Tip of the tongue, the
below the chin floor of the anterior
part of the mouth,
the incisors, the
central part of the
lower lip. And the
skin over the chin.
Anterior cervical Lie along the course The skin and
of the anterior superficial tissues of
jugular vein in front the front of the neck
of the neck
Superficial cervical Lie along the course Skin over the angle of
of the external the jaw, skin over the
jugular vein lower part of the
parotid gland, and
the lobe of the ear
8. Node Location Structures drained
Retropharyngeal Lie behind the The nasopharynx,
pharynx and in front the auditory tube,
of the vertebral and the vertebral
column column
Laryngeal In front of the larynx larynx
Tracheal Alongside the Neighboring
(paratracheal) trachea structures, including
the thyroid gland
10. - Form a vertical chain along the course of
the internal jugular vein within the carotid
sheath.
- receive the lymph from all the groups of
regional nodes.
- efferent lymph vessels from the deep
cervical nodes join to form the jugular trunk,
which drains into the thoracic duct or right
lymphatic duct.
11. Node Location Structures drained
Jugulodigastric node Below and behind Tonsil and the tongue
the angle of the jaw
Jugulo-omohyoid Close to the tongue
node omohyoid muscle
