Histology Flashcards
Brunners Glands
What are they
where are they found
Purpose
- Submucosal glands of duodenum
- Lubricate
- Secrete alkaline mucous to aid in absorption and protect against acidic chyme
Lumpy jaw is caused by
Actinomyces israelii
Large slow growing lumps form on jaw and neck
2 traits of the actinomyces family
Sulfur granules
fungus like hyphae
Granulation tissue composition 6
- Formed during healing of a wound
- Endothelial cells
- Connective tissue
- New collagen
- Tiny vascular components
- Fibroblasts
- Capillary buds
Epidermis
Cell type
Layers
- Stratified Squamous epithelium
- Corneum
- Lucidium
- Granulosum
- Sspinosum
- Basale
No capillaries present
What are the 3 CT layers tht surround Skeletal Muscle and what do they surround
- Epimysium
- Surrounds the entire muscle
- Perimysium
- Surrounds the muscle fascicles (bundles)
- Endomysium
- Surround individual muscle fibers
Tissue of GI tract
Simple Columnar (ciliated)
Oral Cavity
Keratinized (around teeth and HP)
Non-keratinized stratified squamous epithelium
Respiratory tract
Simple columnar (non-ciliated)
AKA Pseudostratified epithelium
Upper resp tract
Ciliated Columnar Epithelium
What are Graafian Follicles and their importance
- Graafian follicles (aka ovarian follicles) is where an ovum matures in an ovary
- The ovum will rupture from the follicle on day 14 and ovulation will begin
4 types if Inflammatory Exudates
- Purulent or supporative
- Pus forms
- Fibrinous
- Fibrinogen and fibrin present
- Catarrhal
- High mucous content
- Malignant
- Pleural effusion present (fluid build up btw tissues that line the lungs and chest)
What 5 proteins make up Fibrous CT
Collagen
Fibronectin
Elastin
Vimentin
Laminin
What type of collagen is found in
Hyaline
Elastic
Fibrocartilage
Hyaline type II
Elastic type II
Fibrocartilage type I and II
Actin thin filaments composed of 5
G actin
Tropomyosin
trponin
alpha actin Z anchor
Nebulin- stabilizer
Thick myosin filaments composed of
Myosin
Titin
What 3 hormone regulate osteoclasts
Where are ostoclasts found in the bone
Parathyroid, GF IL6, Calcitonin
Howships lacunae
Type I collagen
function
found
Resistance to tension
Skin tendons bone fibrous cartilage
MOST abundant
Type II collagen
function
Resistance to intermittent pressure
More flexible
Type III collagen
function
forms
found 3
Structural maitenance and elasticity
Forms reticular fibers
Smooth muscle, arteries, uterus
wherever retraction commonly occurs
Type VII collagen
function
Forming anchoring fibrils that join epidermal basal lamina to underlying CT
Coagulative necrosis
Occurs after ischemic attack
cells that dont have high numbers of lysozymes
Commonly in heart
Caseous necrosis
Tuberculosis, fungal, malignancies, granulomas
Liquefactive necrosis
Causes supporation (pus)
Due to large amounts of cells dying due to autolysis or hereolysis
Common with pancreas and brain infarcts
Intercalated discs contain which 3 adhering junctions
Fascia adhrens (actin anchoring sites)
Macula adherens (desmosomes) anchor intermediate filaments
Gap junctions- permit ion passage for action potential
