Submandibular Gland: Anatomy, Histology, Blood Supply & Nerve Supply

Submandibular Gland

Submandibular Salivary Gland Anatomy:

• It is a large salivary gland situated in the anterior part of the digastric triangle
• It is roughly J-shaped structure being indented by the posterior border of the Mylohyoid
• This divides it into large superficial part & small deep part

1. Submandibular Salivary Gland  Superficial part:

• • • It fills the digastric triangle
    • It has 3 surfaces

2. Submandibular Salivary Gland  Deep part:

• It is related

Submandibular Salivary Gland  Histology:

• Submandibular gland contains serous end peices & mucous tubules
• Serous end peices contains abundant secretory granules, spherical nucleus & basophilic cytoplasm Mucous secretory cells are filled with pale staining secretory material & little cytoplasm
• Its nucleus is compressed & contains densely stained chromatin
• The lumina of mucous tubules are larger
• The Intercalated & Striated ducts are less in number

Submandibular Salivary Gland  Blood supply:

Submandibular Salivary Gland  Nerve supply:

• It is supplied by branches from the submandibular ganglion
• It carries

1. Secretomotor fibres:

• Its course is as follows:
  • Superior salivatory nucleus → Nervus intermedius → Facial nerve → Chorda tympani nerve →→ Lingual nerve → Submandibular ganglion → Relay Post ganglionic fibres from it reaches Submandibular & Sublingual gland

2. Sensory fibres:

• It arises from the lingual nerve

3. Vasomotor sympathetic fibres:

• Arises from the plexus on the facial artery