Four tissue types
Epithelial, connective, muscle, nervous
Fixed tissue def
Tissue is in a solvent
Sectioned def
Cut into thin slices for light or electron transmission
Stained def
Enhancing contrast
Artifacts def
Distortions
Light microscopy uses metal coatings and electron microscopy uses dyes
F. Other way around
Epithelial def
Sheet of cells covering surfaces or cavitgies
Two main form of epithelial (what they are, not categorized)
Covering and lining, glandular epithelia
Epithelial tissue common example
Skin
Glandular epithelia meaning and example
Secretory gland tissues. Salivary glands
Protection, absorption, filtration, excretion, secretion and senosory are all functions of what kind of tissue
Epithelial
Polarity, specialized contacts, connective tissue support, avasvular but inner acted, and regeneration are factors of connective tissue
F. Epithelial
Apical surface def
Exposed to surface of cavity with microvilli
Basal surface def
Faces towards body, holding surface of epithelial to other cellas
We haste are epithelial tissues
Form continuous sheets and binding adjacent cells
What are the lateral contacts
Tight junctions, desmosomes
Tight functions
Stitching tightly tight
Desmosomes def
Anchoring junctions, binding like velcro
Cadherins def
Linker proteins
Tight junctions vs desmosomes diff
One is tight to prevent leaks, other provide structural strength
Epithelial sheets are supportive by connective tissue like lateral laminate
F. Reticular lamina
Baseman memberances are made up of
Basal and reticular lamina
Why are basement membranes there
Reinforces, definition, resists stretching and tearing,
Cancerous epithelial cells die along the basement membrane
F. Penetrate the boundary and invade tissues