Tissues

Tissues

1. Intercellular Junctions

   • Tight Junctions
     • close space between cells by fusing cell membranes
       • ex. cells that line the small intestine
   • Gap Junctions
     • Form tubular channels between cells that allow the exchange of substances
       • ex. Muscle cells of the heart and digestive tract
   • Desmosomes
     • Bind cells by forming "spot welds" between cell membranes
       • ex. cells of the outer skin layer

2. Muscle

   • Muscle tissue contracts, moving structures attached to it. Muscle cells are also called muscle fibers.

3. Connective

   • Connective tissue connect, supports, protects, provides frameworks, fills spaces, stores fat, produces blood cells, protects against infection, and helps repair damaged tissues.

4. Nervous

   • Found in the brain, spinal cord, and peripheral nerves

5. Epithelial

   • Characteristics: Lack blood vessels, cells readily divide,cells are tightly packed together

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