"The blood vessels of the alimentary canal are located in the submucosal layer. It helps in the absorption of nutrients."
The position of the alimentary canal's blood vessels in the submucosal layer aids in the absorption of nutrients in the blood. A robust supply of blood and lymphatic arteries, lymphoid follicles, and nerve fibers that nourish the surrounding tissues of the GI tract wall can be found in the submucosa, which is an areolar connective tissue located just outside the mucosa.
The majority of the nutrients in the meal are absorbed in the small intestine before being transported by the circulatory system to other areas of the body for storage or utilization.
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