510-5 Flashcards
epidermis
keratinized, avascular, innervated
3 functions of the oral cavity
- ) nutrient ingestion/digestion
- ) communication
- ) immune response
langerhans cells
(dendritic cells) can migrate through the epithelia to the dermis to present antigens to T lymphocytes
merkel’s cells
(tactile cells) epidermal cells that contact a sensory neuron to form a mechanoreceptor
thick skin
does not have hair and is found on the palms and soles of feet
thin skin
has hair and is found everywhere but the palms and soles of feet
melanocyte
found in the basal layer of epithelium and injects melanin into keratinocytes via CYTOCRINE INJECTION
orbicularis oris
muscle of the lip
3 types of lip epithelia
- ) thin skin of the face- w/ hair and glands
- ) vermillion border- thin skin w/out hair, has sebaceous glands, highly innervated by MEISSNER’S CORPUSCLES
- ) oral mucosa- thick epithelia parakeratinized/nonkeratinized
4 layers of the digestive tract
- ) mucosa
- ) submucosa
- ) muscularis externa
- ) serosa
3 types of oral cavity mucosa
- ) lining
- ) masticatory
- ) specialized
rete ridges
ingrowth of epithelia
masticatory mucosa
found on the gingiva and hard palate (keratinized/parakeratinized) firmly attached to bone
4 layers of keratinization
- ) basal- hemidesmosomes attach cells to basal lamina
- ) spinosa- desmosomes attach cells to eachother
- ) granulosum- filled with keratin granules
- ) corneum- impermeable keratinized cells
fordyce’s granules
clusters of sebaceous glands in the oral mucosa
gingiva
masticatory mucosa around the neck of the tooth
5 parts of gingiva
- ) attached
- ) free
- ) marginal/crest
- ) sulcular
- ) junctional
specialized mucosa
dorsal surface of the tongue
