Nervous Tissues

• Nervous Tissue

  • function by facilitating coordination, control, and communication
• Nerve

  • small string-like structure that carries impulses across the body
• What type of tissue is the outer covering of nerve?

  Loose connective tissue
• Epineurium

  • outer covering of loose connective tissue of nerves
• Fascicles

  • also known as nerve bundles
  • internal bundle of nerves
• Perineurium

  • dense sheath of connective tissue
• Nerve fibers or Axons

  • bundles within fascicles
• Schwann or myelin sheath

  • layer of white insulating material surrounding nerve fibers
• Endoneurium

  • wraps around each nerve fiber and appears to fill in the rest of the fascicle's interior
• Neuron

  • functional unit of the nervous system
• Neuron

  specimen: cow nerve smear
• Cell body or soma

  • contains nucleus and protoplasmic extensions
• Parts of a neuron

  A) dendrites

  B) cell body

  C) axon