Contents and functions

Mucosa &

Sub-mucosa

Sub mucosa

Submucosa consists of

connective tissues of varying

thickness and density

It attaches the mucous

membrane to the underlying

structures

Nature of attachment (Loose or

firm) depends on the character of

the submucosa

Minor salivary glands

Blood vessels

Nerve endings

Adipose tissue

Lymphatics

Collagen fibres

Various structures found in Sub mucosa

Blood supply Arteries

Larger arteries divide into smaller

arteries in submucosa & enters Lamina

propria

In Lamina propria they again divide into sub epithelial capillary network

VeinsVeins

originating from the capillary network then course back in

the path of arteries

Sensory nerves are

more concentrated

at the anterior region of the oral cavity

The nerves are myelinated when

they enter submucosa but

lose their myelin sheath before splitting in to

their end arborization

Specialized receptors for various types of stimuli are found in Papillae• Cold; Krause end

bulbs• Touch; Meissner’s

corpuscle • Pain; Free nerve

ending

Nerve supply

Ultra stucturally, Basal lamina has two layers• Lamina lucida• Lamina densa

Lamina lucida face the basal cell layer of epithelium

Lamina densa is

characterized by the

insertion of anchoring fibrils and collagen

bundles and faces

submucosa

Basal Lamina

Based on function , Mucosa can be classified as

Mucosa

Mucosa

Masticatory mucosa

Eg: Mucoperiostiu

m

Lining mucosa

Eg: Buccal mucosa

Specialized mucosa

Eg: Tongue mucosa

Keratinized epithelium

Layers of epithelial cells in the mucosa

Keratin layers

Stratum corneum

Stratum Granulosum

Stratum spinosum

Stratum Basale

Non-Keratinized epithilium

Stratum superficiale

Stratum Intermedium

Stratum Basale

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