Which layer of the gi tract participates in chemical digestion and absorption?

The mucosa

Explanation:

The mucosa is the innermost layer of the GI tract and it has two main functions: Secretion and absorption.

The mucosa comes into contact (directly) to chyme, so the mucosa has goblet cells, which are specialized cells, that secrete a protective lining of mucus throughout the GI tract to protect it from harm. It is in the epithelium layer of the mucosa where the most absorption occurs.

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