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Part IV: Nervous Tissue

Explore the structure and function of nervous tissue in the body and learn about the process of tissue repair. Understand the regenerative capacity of different tissues and the steps involved in wound healing.

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Part IV: Nervous Tissue

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  1. Part IV: Nervous Tissue • Main component of nervous system • Structure: neuron = dendrite + cell body + axon • Function: regulates and controls body functions • Location in the body: brain, spinal cord, nerves

  2. Part IV: Nervous Tissue • 2 Major Cell Types: • Neurons • Respond to stimuli • Transmit electrical impulses • Other cells • Support, insulate, protect neurons

  3. Tissue Repair • Wound healing • Two ways: • Regeneration: replace destroyed tissue by same kind of cells • Fibrosis: form scar tissue (dense fibrous connective tissue) • Depends on: • Type of tissue damaged • Severity of injury

  4. Steps to Tissue Repair: • Inflammation • Capillaries become very permeable • WBC’s and clotting proteins seep into injured area • Clot prevents loss of blood (surface dries, forms a scab)

  5. Steps to Tissue Repair: • Granulation tissue forms • Delicate pink tissue with new capillaries • Connective tissue produces collagen fibers • Epithelial cells multiply over granulation tissue

  6. Steps to Tissue Repair: • Surface epithelium regenerates • Surface epithelium thickens • Fibrous tissue matures – forms scar tissue

  7. Regenerative Capacity of Different Tissues

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