Histology
Histology:  the study of tissues

Tissue: a group of cells with the same structure and function.




 TISSUE TYPE               LOCATION                FUNCTION               ORGAN (EXAMPLE)

      Muscle              Throughout the body        Movement              Biceps, calves, heart,
                                Attached to bones                                          diaphram

        Nervous              Everywhere          Sends electical impulses    Brain, spinal cord

       Connective           Everywhere           Connects / holds            Ligaments, tendents,     
                                                                 structures together         bloods and bone
      
       Epithelial                Surfaces of             Covers, protects,           All, skill (largest)
                                      structures              diffusion (allows)
Muscle Tissue
I.     Skeletal Muscle
           -Attached to bones
           -Voluntary muscle tissue 
           -Each cell has many nuclei
           -Striations
II.    Smooth Muscle
           -Involuntary
           -Shorter
           -Single nuclei in each cell
III.   Cardiac Muscle
           -Only in heart
           -Intercalated discs
           -Striated
           -Branched interconnective
           -Involuntary
Connective Tissue
-Large matric (intercellular)
-Made of fibers and cell materials
-Spread apart
-Most abundant type of tissue by wieght
                        Fiber Types
I.     Collagenous
          -Collagen (Protein)
          -Large Tensile strength
          -Bones/Ligaments
                 * Dense connective tissue when 
                    there are a lot of them.
II.     Elastic Fibers
          -Elastin (protein)
          -Vocal Chords/lungs (stretch)
          -Plastic surgeons use elastin powder
III.    Reticular Fibers
          -Thin but highly branched (collagen)