The lumen of the gastrointestinal tract is considered to be outside the body.

Question

Quizplus · Accepted Answer

The gastrointestinal tract, also known as the digestive system, is a series of organs that function to digest and absorb nutrients from food. The lumen, or the hollow space inside the digestive tract, is considered to be outside the body because it is not part of the body's internal environment. Instead, it is a pathway through which food and waste products pass before being eliminated from the body.

The Lumen of the Gastrointestinal Tract Is Considered to Be