The inner most layer is the mucosa, underneth the mucosa is the submucosa,then its the muscular layer, and lastly is the serous layer. The mucosa carries on secretion and absorption of dietary nutrients and protects the tissues of the canal. The submucosa nourishes the surrounding layers of the canal and Consists of loose connective tissue, housing blood and lymphatic vessels, nerves, and glands. The muscularis propels food through the and Consists of 2 layers of smooth muscle: inner circular layer and outer longitudinal layer. Lastly the serosa layer Protects underlying tissues, and secretes serous fluid to reduce friction between the organs.