Category: P

One of the openings on the posterior aspect of the sacrum through which the posterior primary branches of the sacral nerve pass.  

The opening behind the condyle of the occipital bone. A small vein passes through it.  

The openings of the palatine canals through which nerves pass to the mucosa of the hard and soft palate.  

Any of the longitudinal ridges along the cervical canal of the uterus.  

The maximum volume of air that can be expelled from the lungs during a vigorous exhalation. Its measurement is used to determine the degree of respiratory impairment in patients with obstructive lung diseases. A metric that assesses the highest velocity at which a patient exhales (breathes out), commonly referred to as the peak expiratory flow…

A section of soft tissue surgically separated from underlying bone and removed or repositioned to eliminate periodontal pockets or to correct mucogingival defects.  

An opening from the vagina through the perineum.  

A canal through which inner ear fluid may leak into the middle ear that may produce sudden hearing loss, tinnitus, or vertigo. The lesion, which can arise congenitally, after trauma, or by erosion, is one of the few examples of sensorineural hearing loss that can be repaired with surgery to the cochlear aqueduct.  

A fistula from the parotid gland to the skin surface.  

The opening into the undersurface of the liver. It continues into the liver as the portal canal.