Definition: collections of specialized cells and cell products that preform a relatively limited number of functions.
Four Types of Tissues
Connective Tissue Functions
1. Establishes a structural framework for the body.
2. Transports fluids and dissolved materials.
3. Protects delicate organs
4. Stores energy reserves.
Epithelial Tissue Functions
1. Provides physical protection to the skin from abrasion, dehydration, and destruction
2. Controls Permeability-any substance that leaves the body must pass the epithelial tissue.
3. Provides sensation to the skin by large sensory nerve supplies.
4. Produce specialized secretions that discharge onto the surface of the epithelium.
Muscle Tissue Functions
1. Moves materials along the digestive tract and around the cardiovascular system.
2. Moves or stabilizes the position of the skeleton
3. Regulates diameter of blood vessels.
Nervous Tissue Functions
1. Reacts to stimuli
2. Conducts inpulses to various organs in the body
Connective- classified on the basis of types and relative abundance of cells, fibres and ground substance.
Epithelial-by the way the cells are arranged in layers and by the shape.
Muscle- classified functionally by voluntary or involuntary or structurally as striated or smooth.
Nervous-neurons and neuroglia
Specializations of Epithelia
1. Transporting of fluids over the epithelial surface.
2. Movement of fluids to control permeability
3. production of secretions that provide physical protection or act as chemical messengers
Examples of where these 4 types can be found
Connective- cartilage and bone
epithelial-covers every surface, both external and internal, of the body
muscle- around the bones for support
Nervous tissue- around the brain and spine