Unit 2 Flashcards
Microscopic Anatomy
-The study of the structure of cells tissues and organs of the body as seen with a microscope
Histology
-Study of microscope structure and function of tissue
Embryology
-Study of prenatal development
Tissue
-Structure formed by grouping of cells with similar characteristics of shape and function
A common tissue stain combination is hematoxylin and eosin. What happens to the nuclei, cytoplasm and intercellular substance when epith cells are stained using these materials.
- Hematoxylin turns acidic material blue ex: nuclei, ground substance
- Eosin turns alkaine components pink ex: cytoplasm, collagen
What must be done with mineralized tissue in order to slice it with a microtome? Briefly describe this process.
-It must first be demineralized, which needs to be places in an weak acid solution to help soften the tissue
How is tooth enamel sectioned and preserved? What are these sections called and how is it different from soft tissue sections?
-It is first softened and then cut, and then placed on a slide and adhesive is used to help preserve
Lining Mucosa (identify type of epith, CT and submucosa)
- Epith: non-keratinized SSE
- Lamina Propria: extensive vascular supply, loose CT papillae, some elastic fibers
- Submucosa: present, loose attachment to muscles and bones, minor salivary glands, adipose CT with sublingual and submandibular salivary glands
- Ex: labial and buccal mucosa, alveolar mucosa, ventral surface of tongue and FOM
Masticatory Mucosa (identify type of epith, CT and submucosa)
- Epith: keratinized and parakeratinzed
- Lamina Propria: dense CT
- Submucosa: present in hard palate with ant with adipose CT and most with minor salivary glands, not present in attached gingiva
- Ex: hard palate and attached gingiva
Specialized Mucosa (identify type of epith, CT and submucosa)
- Epith: vaires and contains taste buds
- Lamina Propria: rich vascular supply, immovable relative to muscles
- Submucosa: minimal submucosa -> minor salivary glands and adipose tissue
Describe lamina propria in the various types of oral mucosa?
- Refer to oral mucosa flash cards (lining, masticatory and specialized)
- Papillary layer: forms C papillae, layers of superficial loose CT, located in the lamina propria of oral mucosa
- Dense Fibrous layer: tightly packed CT with regular arrangement, ropey like due to fibres and collagen
Functions of lamina propria (CT)
- Movement
- Support
- Protection
- Binding
- Insulation
- Transportation
- Formative
- Nutritive
- Sensory
What structures separate the lamina propria from epith?
-Basement membrane
What structures are generally below or deep tp the lamina propria?
-Submucosa if present, then muscles, bones, etc
Histology of keratinized epith.
- Layers of SSE
- Least common form of epith, associated with masticatory mucosa of the hard palate, attached gingiva and specialized mucosa of the lingual papillae on the dorsal surface of the tongue