Mesothelium
Epithelial tissue that lines body cavities
Endothelium
Lines heart and blood/lymph vessels
Epithelium
Lines external and internal body walls and glands
Ground substance molecules
GAGs:disaccharide repeats can form hyaluronan complexes (biggest contributor to hydrophillic nature of Ground substance)
Proteoglycans: core proteins that tend to aggregate
Multi adhesive glycoproteins: cell attachment and cell signaling sites
Surface ectoderm makes what
All epithelial tissues of external surfaces.
Neural ectoderm makes what?
Most nervous tissues
Neural tube makes what?
CNS features (brain/spinal cord)
Neural crest forms what?
PNS tissues
Endoderm forms what?
Epithelial of respiratory, urinary, endocrine and digestive systems
Mesoderm forms what?
Skeletal and smooth muscle, connective tissues, reproductive tracts
Lateral plate forms what?
Cardiac muscle, blood, lymph and endothelium parts
Action Proteins in cilia
Dysin and kinsin form axoneme which allows for cellular movement
Terminal bar formed from
Tight junctions
Adherens junctions
Desmosomes
Gap junctions
Provide cellular communication for neighboring cells via connexons
Cilia
Short extensions at the apical surface of cellular membranes
-motile and mobile
Microvilli
Short extension at the apical surface. Provide increased surface area and move mucus
- non motile, but mobile
Stereovilli
Long extension of cellular membranes. Increase surface area.
- non motile but mobile
Tight junctions
Form a functional seal between cells and limits paracellular movement of fluid and solutes.
- have 3 main proteins (occludins, Claudius and JAM molecules)
Adhering junctions
Strong physical attachment of cells at the terminal end of lateral surfaces.
Desmosomes
spot-like attachments between cells found on the lateral surfaces.
Pelican
Reciprocal folding of lateral walls of adjacent cells that increase surface area.
Merocrine
Secretory products are released in membrane bound vesicles that fuse to apical surface and conduct executors is of products.
Holocrine
Secretory product builds up in cells and then is released via apoptosis of the cell
Apocrine
Secretory product is included within a piece of the plasma membrane envelope and released at the apical domain