Histology Flashcards
Identify structures A to D in this histology slide of the keratinized gingiva.
A - Keratin Layer
B - Stratum Granulosum
C - Stratum Spinosa
D - Lamina properia (stratum basale between this and spinosa)
Identify structuress A to D in this histology slide of the parakeratinised gingva.
A - Stratum corneum
B - Stratum Granulosum
C - Stratum Spinosa
D - Lamina properia (stratum basale between this and spinosa)
Identify structures A to D in this histology slide of the non-keratinised gingiva.
A - Superficial layer
B - Stratum Intermedia
C - Stratum Spinosa
D - Stratum Basale
Which mucosa in the mouth is keratinized?
Keratinized mucosa is found in areas of the mouth that are subjected to mechanical stress and friction, such as the gingiva (gums) and the hard palate. This type of mucosa has a thick, protective layer of keratin on its surface, making it tough and resistant to damage.
Which mucosa in the mouth is non-keratinized?
Non-keratinized mucosa is typically found in areas of the mouth that are not exposed to as much mechanical stress, such as the buccal mucosa (inner lining of the cheeks), the floor of the mouth, and the ventral surface of the tongue. This type of mucosa lacks the protective layer of keratin and is more delicate and sensitive.
Which mucosa in the mouth is para-keratinized?
Parakeratinized mucosa is a transitional type of mucosa found in some parts of the mouth, like the junction between the hard and soft palates. It has a partially keratinized surface, which means it contains some keratin but not as much as fully keratinized mucosa.
What is atypical about this histological sample of the hard palate, and why could this be?
Hyperkeratinisation
Large keratin layer on the outermost surface, likely from the result of trauma, smoking, or intesive irriation.
What is atypical about this histological sample of the bucall mucosa, and why could this be?
Partial keratinization of the buccal mucosa
Likely from trauma, or irriation from smoking.
What is the function of basal cells in the epithelium?
Basal cells are essential for the maintenance, repair, and regeneration of stratified squamous epithelial tissues, and they serve as a source of new cells that contribute to the tissue’s structural and functional integrity.
What is the function of the stratum spinosum?
The stratum spinosum is an important transitional layer in the epidermis, where cells prepare to fulfill their roles in maintaining integrity and protecting the body from the external environment. This layer is crucial for the overall function of the skin as a protective organ.
Also key for desmosome formation.
What is the function of squamous cells?
Squamous cells are typically located in the outer or superficial layers of stratified squamous epithelium, where their flat shape contributes to the protective and barrier functions of the tissue. The specific location and function of squamous cells may vary depending on the type of epithelial tissue in the body.
Identify the structures in this slide of the posterior third of the tongue.
E - Epithelium
Cr - Crypt
L - Lymphoid tissue
F - Lymphoid folicle
Identify the structures in this slide of the tongue.
CV - Circumvilate Pappila
C - Crypt
VE - von Ebner’s Gland
Identify the structures in this slide of the tongue.
FG - Fungiform papilla
FL - Filiform papilla
Identify the structures in this slide of the anterior two thirds of the tongue.
FL - Filiform papilla
CV - Circumvillate papilal
SG - Serous gland
M - Skeletal muscle
LP - Lamina propria
M - Mucous glands
Identify the lablled stuctures on this slide of the hard palate.
B - Bone
S - Submucosa
L - Lamina propria
E - Epithelium
Identify structures A to H on this histological cross section of a mucous membrane.
A - Epithelium
B - Lamina Propria
C - Submucosa
D - Pupillary layer
E - Reticular layer
F - Minor salivary gland
G - Nerve and vein
H - Bone
Identify the following tissue reactions, indicated by arrows below.
Keratosis - keratinisation of a normally non keratinised site.
Acanthosis - hyperplasia of teh stratum spinosum
Elongated rete ridges - hyperplasia of the basal cells
Identify structures A to E on this histological cross section of the lower lip.
A - Vermillion Border
B - Orbicularis Oris muscle
C - Hairy Skin
D - Labial mucosa
E - Labial minor salivary gland
