labelling the mammalian gut wall

• lumen


  what is the whole in the middle

  
• mucosa


  what is b

  
• serosa


  what is e

  
• muscluaris


  what is d

  
• submucosa


  what is b

  
• nerves


  what is a

  
• villi , mucosa , sub mucosa , circular muscle , longitudinal muscle , serosa


  list starting with the inner most layer the layers of the mammalian gut