The GI tract is lined by a series of tissues in anorganized way. Describe the four layers of the GI tract (5 points).Using the stomach as a model organ, discuss the various cell typesthat exist, their function, and the communication that existsamongst the various cell types in order to accomplish its digestivefunction. Be sure to explain the types of communication that arepresent (e.g. autocrine, paracrine, endocrine etc.) (10points)
