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Tissues (Connective Tissues (loose connective tissue proper (areolar…

- - - - gel-like matrix with three fiber types; cells: fibroblasts, macrophages, mast cells, and some white blood cells
    - - matrix as in areolar, but very sparse; closely packed adipocytes, or fat cells, have nucleus pushed to the side by large fat droplet
    - - network of reticular fibers in a typical loose ground substance; reticular cells lie on the network
  - - - primarily parallel collagen fibers; a few elastic fibers; major cell type is the fibroblast
    - - primarily irregularly arranged collagen fibers; some elastic fibers; major cell type is the fibroblast
    - - consists of both collagen and elastic fibers all oriented in the same direction; appear thin and black (if stained) or wavy
  - - - amorphous but firm matrix; collagen fibers form an imperceptible network; chondroblasts produce the matrix and when mature (chondrocytes) lie in lacunae
    - - similar to hyaline cartilage, but more elastic fibers in matrix
    - - matrix similar to but less firm than that in hyaline cartilage; thick collagen fibers predominate
  - - - hard, calcified matrix containing many collagen fibers; osteocytes lie in lacunae; very well vascularized
- - - - single layer of flattened cells with disc-shaped central nuclei and sparse cytoplasm; simplest of epithelia
    - - single layer of cube-like cells with large spherical central nuclei
    - - single layer of tall cells with round to oval nuclei; some cells bear cilia; layer may contain mucus-secreting unicellular glands (goblet cells)
    - - single layer of cells of differing heights, some not reaching the free surface; nuclei seen at different levels; may contain mucus-secreting cells and bear cilia
  - - - thick membrane composed of several cell layers; basal cells are cuboidal or columnar and metabolically active; surface cells are flattened (squamous); in the keratinized type, the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more superficial layers
    - - rare type found in sweat, mammary and salivary glands. Will cover more next week
    - - not held accountable for this
    - - resembles both stratified squamous and stratified cuboidal; basal cells cuboidal or columnar; surface cells dome shaped or squamouslike, depending on degree of organ stretch