Topic #7: Epidermis with Cnidocytes

• Epitheliomuscular cell

  • for movement and protection
• Longitudinal muscles

  • cells that produce stinging cell
• Sensory cells

  • cells for sensing
• Interstitial cell

  • totipotent cell which means that they can be converted to other types of specialized cells
• Circular Muscle Fibers

  • squeezes the subumbrellar space by contraction, forcing out contained water and causing the medusa to move by jet propulsion.
• Identify parts:

  A) tentacle

  B) mouth

  C) gastrovascular cavity

  D) gastrodermis

  E) mesoglea

  F) nerve net

  G) epidermis

  
• Identify parts (cross section of hydra):

  A) gastrovascular cavity

  B) gastrodermis

  C) mesoglea

  D) epidermis

  E) epitheliomuscular cells

  F) longitudinal muscle fibers

  G) cnidocyte

  H) sensory cell

  I) interstitial cell

  J) circular muscle fibers