Question

what are gut wall and body wall ?

Answer 1

The human gastrointestinal tract consists of the esophagus, stomach, and intestines, and is divided into the upper and lower gastrointestinal tracts.[5] The GI tract includes all structures between the mouth and the anus,[6] forming a continuous passageway that includes the main organs of digestion, namely, the stomach, small intestine, and large intestine. However, the complete human digestive system comprises the gastrointestinal tract plus the accessory organs of digestion The gastrointestinal tract (digestive tract, digestional tract, GI tract, GIT, gut, or alimentary canal) is an organ system within humans and other animals which takes in food, digests it to extract and absorb energy and nutrients, and expels the remaining waste as feces. The mouth, esophagus, stomach, and intestines are part of the gastrointestinal tract. 

Body wall: The portion of an animal body that consists of ectoderm and mesoderm, forms the external body surface, and encloses the body cavity.

Answer 2

Gut wall means lining of alimentary canal