Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Mucosa is the moist, inner lining of some organs and body cavities, including the digestive system, where it secretes mucus. This layer plays a crucial role in nutrient absorption and protecting the body from infection.
In anatomy and physiology, absorption refers to the process by which nutrients from food pass through the mucosal lining of the gut into the bloodstream.
Secretion is the process by which substances are produced and discharged from cells or glands; in the context of mucosa, it often refers to mucus production