abluminal

Example:The peritoneal fluid was examined for signs of infection.

Definition:Of or relating to the peritoneum, the transparent membrane that lines the abdominal and pelvic cavities and encloses the digestive tract; relating to the inner surface of an organ or structure.

Example:The internal organs of the body must be protected and maintained for overall health.

Definition:Situated or occurring within a body or an organ; inside; within the cavity of a structure; within an inclosure or cavity.

Example:The interior of the building required renovation to improve its aesthetics and functionality.

Definition:Situated within; belonging to the inside of something; not on the surface; inner; as opposed to outer or external.