Glands of Head and Neck Anatomy Types Functions and Clinical Importance
ANATOMY

Glands of Head and Neck Anatomy Types Functions and Clinical Importance

Dec 18, 2025 3 min read

Below is a clear, exam-oriented yet complete description of the glands in the head and neck, without images, suitable for medical students, anatomy revision, and clinical correlation.

Glands of the Head and Neck – Detailed Anatomy

Glands in the head and neck are primarily exocrine glands involved in saliva production, lubrication, immunity, thermoregulation, and endocrine regulation. They are classified into salivary glands, endocrine glands, mucous glands, sebaceous glands, and specialized glands.

I. SALIVARY GLANDS

Responsible for saliva secretion → lubrication, digestion (amylase), oral hygiene.

A. Major Salivary Glands

1. Parotid Gland

  • Largest salivary gland
  • Type: Pure serous
  • Location:

* In the parotid bed

* Anterior to ear, posterior to ramus of mandible

  • Relations (Superficial to deep):

* Skin → fascia → facial nerve → retromandibular vein → external carotid artery

  • Duct: Stensen’s duct

* Opens opposite upper second molar

  • Nerve supply:

* Parasympathetic: Glossopharyngeal nerve (CN IX) via otic ganglion

  • Clinical relevance:

* Parotitis (mumps)

* Facial nerve injury during surgery

2. Submandibular Gland

  • Type: Mixed (predominantly serous)
  • Location:

* Submandibular triangle

* Superficial and deep parts around mylohyoid muscle

  • Duct: Wharton’s duct

* Opens at sublingual papilla

  • Nerve supply:

* Parasympathetic: Facial nerve (CN VII) via chorda tympani

  • Clinical relevance:

* Common site of salivary stones (sialolithiasis)

3. Sublingual Gland

  • Smallest major gland
  • Type: Mixed (predominantly mucous)
  • Location:

* Floor of mouth

* Beneath mucosa, above mylohyoid

  • Ducts: Multiple ducts of Rivinus
  • Nerve supply:

* Facial nerve (CN VII)

  • Clinical relevance:

* Ranula (mucous cyst)

B. Minor Salivary Glands

  • Numerous small glands embedded in mucosa
  • Locations:

* Lips

* Cheeks

* Tongue

* Soft palate

  • Type: Mostly mucous
  • Clinical importance:

* Tumors (often malignant)

II. ENDOCRINE GLANDS OF HEAD AND NECK

1. Thyroid Gland

  • Largest endocrine gland
  • Location:

* Anterior neck

* Opposite C5–T1 vertebrae

  • Structure:

* Two lobes + isthmus

  • Hormones:

* T3, T4 → metabolism

* Calcitonin → calcium regulation

  • Blood supply:

* Superior thyroid artery

* Inferior thyroid artery

  • Clinical relevance:

* Goiter

* Hypothyroidism, hyperthyroidism

2. Parathyroid Glands

  • Usually four glands
  • Location:

* Posterior surface of thyroid

  • Hormone:

* Parathyroid hormone (PTH)

  • Function:

* Increases blood calcium

  • Clinical relevance:

* Hypocalcemia after thyroid surgery

3. Pituitary Gland

  • Master endocrine gland
  • Location:

* Sella turcica of sphenoid bone

  • Divisions:

* Anterior pituitary

* Posterior pituitary

  • Function:

* Controls growth, reproduction, stress response

  • Clinical relevance:

* Pituitary adenomas

4. Pineal Gland

  • Location:

* Roof of third ventricle

  • Hormone:

* Melatonin

  • Function:

* Circadian rhythm regulation

III. MUCOUS GLANDS

Nasal Glands

  • Found in nasal mucosa
  • Produce mucus to humidify air

Palatine Glands

  • Located in soft palate
  • Lubricate food during swallowing

IV. SEBACEOUS GLANDS

  • Associated with hair follicles
  • Abundant on:

* Face

* Scalp

  • Produce sebum
  • Clinical relevance:

* Acne vulgaris

* Sebaceous cysts

V. SWEAT GLANDS (MODIFIED)

Ceruminous Glands

  • Located in external auditory canal
  • Produce ear wax (cerumen)
  • Protect tympanic membrane

VI. SPECIALIZED GLANDS

Lacrimal Gland

  • Produces tears
  • Located in superolateral orbit
  • Drains into conjunctival sac
  • Clinical relevance: Dry eye syndrome

VII. LYMPHOID GLANDULAR STRUCTURES

Tonsils (Waldeyer’s Ring)

  • Palatine tonsils
  • Pharyngeal tonsil (adenoids)
  • Lingual tonsils
  • Function: Immune defense

SUMMARY TABLE

| Gland | Type | Function |

| ------------- | --------- | ---------------- |

| Parotid | Serous | Saliva (amylase) |

| Submandibular | Mixed | Saliva |

| Sublingual | Mucous | Lubrication |

| Thyroid | Endocrine | Metabolism |

| Parathyroid | Endocrine | Calcium balance |

| Pituitary | Endocrine | Hormonal control |

| Lacrimal | Exocrine | Tear secretion |

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Frequently Asked Questions

The main glands of the head and neck include the major salivary glands (parotid, submandibular, sublingual), minor salivary glands, endocrine glands (thyroid, parathyroid, pituitary, pineal), lacrimal glands, sebaceous glands, ceruminous glands, and lymphoid glands such as the tonsils.
The parotid gland is the largest salivary gland in the head and neck and is predominantly a serous gland.
The parasympathetic secretomotor supply to the parotid gland is provided by the glossopharyngeal nerve via the lesser petrosal nerve and otic ganglion.
The submandibular gland is most commonly affected by salivary stones due to the long and upward course of Wharton duct and thicker saliva.
The sublingual gland primarily secretes mucous saliva that helps in lubrication of the oral cavity and facilitation of swallowing.
The thyroid gland secretes thyroxine (T4), triiodothyronine (T3), and calcitonin, which regulate metabolism, growth, and calcium homeostasis.
Hypocalcemia after thyroid surgery occurs due to accidental removal or damage to the parathyroid glands, leading to reduced parathyroid hormone secretion.
The pituitary gland acts as the master endocrine gland by regulating growth, metabolism, reproduction, stress response, and the activity of other endocrine glands.
The pineal gland regulates circadian rhythm by secreting the hormone melatonin.
Ceruminous glands are modified apocrine sweat glands in the external auditory canal that produce cerumen (ear wax) to protect and lubricate the ear canal.
The lacrimal gland produces tears that lubricate the eye, remove debris, and provide antimicrobial protection.
Minor salivary glands are small mucous-secreting glands located in the lips, cheeks, tongue, soft palate, and oropharynx.
Tumors of minor salivary glands are most likely to be malignant compared to major salivary glands.
A ranula is a mucous retention cyst arising from the sublingual gland in the floor of the mouth.
Tonsils are lymphoid glandular structures forming Waldeyer ring and play a role in immune defense by trapping and responding to pathogens entering through the oral and nasal cavities.
Related Topics
glands of head and neck anatomy salivary glands of head and neck major salivary glands anatomy minor salivary glands anatomy parotid gland anatomy and nerve supply submandibular gland anatomy and duct sublingual gland anatomy and function endocrine glands in head and neck thyroid gland anatomy and function parathyroid glands anatomy pituitary gland location and hormones pineal gland function mucous glands of oral cavity sebaceous glands of face and scalp ceruminous glands external auditory canal lacrimal gland anatomy and function tonsils of waldeyer ring anatomy head and neck glands clinical importance glands of neck anatomy for medical students
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