The "mouth floor" refers to the inferior aspect of the oral cavity, which is formed by the muscular floor of the mouth, consisting primarily of the mylohyoid muscle, and contains the opening of the sublingual and submandibular glands.

Total lack of teeth through disease or extraction.

A salivary gland on each side of the mouth below the TONGUE.

Cells lining the saclike dilatations known as acini of various glands or the lungs.

Soft tissue formed mainly by the pelvic diaphragm, which is composed of the two levator ani and two coccygeus muscles. The pelvic diaphragm lies just below the pelvic aperture (outlet) and separates the pelvic cavity from the PERINEUM. It extends between the PUBIC BONE anteriorly and the COCCYX posteriorly.

The oval-shaped oral cavity located at the apex of the digestive tract and consisting of two parts: the vestibule and the oral cavity proper.

The surface of a structure upon which one stands or walks.

Injury, weakening, or PROLAPSE of the pelvic muscles, surrounding connective tissues or ligaments (PELVIC FLOOR).