Intramural vs. Intraluminal

Within the walls; within one institution, particularly a school.

Example: ‘Intramural sports involve teams that are all within the same school.’;

Within the substance of the walls of an organ.

Example: ‘intramural pregnancy’;

A (usually sports) competition between teams belonging to the same school.

Being within the walls, as of a city.

Of or pertaining to those activities occurring within a single institution or organization, such as intramural sports involving students of a single school; an intramural debate within a professional society.

Being within the substance of the walls of an organ; as, intramural pregnancy.

carried on within the bounds of an institution or community;

Example: ‘most of the students participated actively in the college's intramural sports program’;

Within a lumen.