Histology Of The Oral/Nasal Cavity Flashcards
What is the respiratory epithelium?
Pseudostratified columnar epithelium with goblet cells
Why is the oral cavity mainly stratified squamous epithelium? What other features are found in the oral cavity?
Protection from hard food
Cells sloughed off and new ones rise to surface
Skeletal muscle and glandular tissue
What is a sulcus?
Groove
Why is the gingival sulcus important clinically? What ligament holds the tooth into the alveolus?
Foreign bodies enter here
Periodontal ligament
What is in the pulp cavity?
Nerves
Blood/lymph vessels
Fat
Why do teeth need decalcifying before mounting?
Enamel doesn’t stain
Which histological structure helps anchor the teeth into the gingiva?
Rete pegs
What colours is connective tissue in trichrome strain?
Green
Within the bone are lacuni, what are these?
Little ‘lakes’ where osteocytes sit
What runs through the Haversian canal in bone histology?
Vessels and nerves
What is the difference between a vein and an artery under the microscope?
Vein has thin walls and large lumen
Arteries have thick walls and small, puckered lumen
Why do arteries endothelium appear puckered under the microscope?
Contains smooth muscle and elastic connective tissue in walls
When blood removed, springs back
What are the key features of skeletal muscle under a microscope?
Striation
Multiple, peripheral nuclei
What are papillae?
Protrusions on the tongue for mechanical function (grooming) or sensory function (taste - contain taste buds)
The tongue has a layer of bright red around it with no detail. What is this and what is its function?
Keratin
Protective layer
