Small intestine wall

• the wall of the small intestine consists of four layers
• the serous membrane- the outer connective tissue
• a muscle layer of; an outer layer of longitudinal muscles

  an inner layer of circular muscles
• the submucosa- a laer of connective tissues with blood vessels, lymph vessels, nerves and glands
• The mucosa- the innermost layer

  it has transverse folds

  there are millions of finger-like projections called villi on these folds