Describe the structure and function of the four basic types of tissues.
1. Muscle tissue
2. Epithelial tissue
3. Connective tissue
4. Nervous tissue
1. Muscle tissue
• formed from muscle fibers
• produces movement in the body
• skeletal muscle is attached to bones
• cardiac muscle is in the heart
• smooth muscle is found in internal organs
2. Epithelial tissue
• close-packed cells form covering for and lining of body structures
• protective barrier
• absorbs substances
• secretes substances
• excretes waste
3. Connective tissue
• supports and protects body structures
• many different forms to perform different tasks
• bone—structural support
• cartilage—shock absorber in joints
• adipose—protective padding
• tendons—connects skeletal muscle to bones
4. Nervous tissue
• composed of neurons
• conducts electrical impulses
• brain, spinal cord, and nerves
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