Assertion: sacrum | /r/HasAspect | four openings
Facets:
Source sentences:
text: The sacrum is a canal that has four openings through which the blood vessels and nerves run.
text: The sacrum has an opening, the sacral canal, through which travels the sacral plexus (nerves).
text: The sacrum has four openings through which blood vessels and the sacral nerves travel as well as the spinal nerves from the lumbar vertebrae.
text: The sacrum has four openings through which the sacral nerves travel.