1. Tissues
group of similar cells that perform a
common function

2. Types of Tissues
 1) Epithelium
* covers body/organ surfaces
* lines body cavities
* forms glands
 2) Connective
* binds/supports/protects other tissues and
organs
 3) Muscle
* moves body, materials within body
 4) Nervous
* makes up the nervous system

3. CHARACTERISTICS OF
EPITHELIA
 Cellularity
 Polarity
 apical surface
 basal surface
 Bound to underlying tissue by a basement membrane
 Avascularity
 High regenerative capacity
 Classified by LAYERS:
 1) Simple Epithelium - one layer thick
 2) Stratified Ep. - many layers thick
 protective function
 Classified by cell SHAPE:
1) Squamous - flattened cells
2) Cuboidal - about as tall as they are wide
3) Columnar - taller than wider shaped cells

4. Epithelial- GLANDS
 Exocrine Glands formed from epithelial
tissues- they secrete their materials onto a
free surface
 A. Unicellular
* one cell
* secrete mucus
 B. Multicellular
* secrete materials through a duct

5. Connective Tissue
 CHARACTERISTICS OF C.T.
 derived from mesenchyme (embryonic CT)
 Consists of:
1) Cells
2) Fibers (protein)
3) Ground Substance
 CT typically is vascular

6. CLASSIFICATION OF C.T.
 Connective Tissue Proper
 Cartilage
 Bone (Osseous Connective Tissue)
 1) Compact
* outer shell of bone
 2) Spongy
* inner lattice-work of bone
* houses hemopoietic tissue
 Vascular Tissue (Blood)

7. Muscle Tissue
 A. Skeletal Muscle Tissue
* long, cylindrical cells
* multinucleated
* nuclei at periphery of cell
* striations
 B. Cardiac Muscle Tissue
* short, cylindrical cells
* some cells are bifurcated (branching)
* has one or two centrally-located nuclei
* intercalated discs
* striations
 C. Smooth (Visceral) Muscle Tissue
* spindle-shaped cells
* one centrally-located nucleus