Frog Spinal Cord x.s

• Spinal cord is housed wihtin neural canals of vertebral column
• 2 general areas in the xs of spinal cord:

  • outer white matter
  • inner grey matter
• White matter consists of myelinated nerve fibers and supporting cells, neuroglia or glial cells
• Grey matter consists of some neuroglia and neurons
• Central canal is lined with cerebrospinal fluid-producing ependymal cells
• Dorsal cornua

  • area in the grey matter that projects into the white matter
• Ventral cornua

  • contains axons which are continuous to the outside as spinal nerves
• Dorsal cornua: afferent nerves

  Ventral cornua: efferent nerves
• 2 connective tissue layers covering spinal cord:

  • loose dura mater
  • inner, thinner pia mater
• Pia mater

  • connective tissue layer that has some veins and adipose tissue
• The space in between pia mater and dura mater is subdural space
• spinal cord xs

  A) dorsal median sulcus

  B) ventral median fissure

  C) dorsal cornua

  D) inner grey matter

  E) outer white matter

  F) pia mater

  G) subdural space

  H) dura mater

  I) ventral spinal artery

  J) ependymal cells

  K) central canal

  L) ventral cornua