| PACO | mean alveolar gas volume |
|---|---|
| PACO2 | partial pressure of carbon dioxide in alveolar gas |
| PACP | pulmonary alveolar-capillary permeability; pulmonary artery counterpulsation |
| PAH | para-aminohippurate; phenylalanine hydrolase; polycyclic aromatic hydrocarbon; predicted adult heigh... |
| PAHVC | pulmonary alveolar hypoxic vasoconstrictor |
| pharyngeal canal | On the undersurface of the vaginal process of the sphenoid bone, a furrow that is converted into a canal by the sphenoidal process of the palatine bone; it transmits the pharyngeal branch of the maxillary artery and the pharyngeal nerve from the pterygopalatine ganglion. Synonym: canalis palatovaginalis, palatovaginal canal. (05 Mar 2000) |
|---|---|
| Rosenthal's canal | The winding tube of the bony labyrinth which makes two and a half turns about the modiolus of the cochlea; it is divided incompletely into two compartments by a winding shelf of bone, the bony spiral lamina. Synonym: canalis spiralis cochleae, Rosenthal's canal, spiral canal of cochlea. (05 Mar 2000) |
| Civinini's canal | <anatomy> A canal in the petrotympanic or glaserian fissure, near its posterior edge, through which the chorda tympani nerve issues from the skull. Synonym: Civinini's canal, Huguier's canal, iter chordae anterius. (05 Mar 2000) |
| Cloquet's canal | A minute canal running through the vitreous from the discus nervi optici to the lens, containing in foetal life a prolongation of the central artery of the retina, the hyaloid artery. See: vitreous, hyaloid artery. Synonym: canalis hyaloideus, central canal of the vitreous, Cloquet's canal, Stilling's canal. (05 Mar 2000) |
| cochlear canal | The winding tube of the bony labyrinth which makes two and a half turns about the modiolus of the cochlea; it is divided incompletely into two compartments by a winding shelf of bone, the bony spiral lamina. Synonym: canalis spiralis cochleae, Rosenthal's canal, spiral canal of cochlea. (05 Mar 2000) |
| plane of pelvic canal | A hypothetical curved line joining the centre point of each of the four planes of the pelvis, marking the centre of the pelvic cavity at every level. Synonym: axis pelvis, plane of pelvic canal. (05 Mar 2000) |
| white line of anal canal | A bluish pink, narrow, wavy zone in the mucosa of the anal canal below the pectinate line at the level of the interval between the subcutaneous part of the external sphincter and the lower border of the internal sphincter, said to be palpable. Synonym: Hilton's white line. (05 Mar 2000) |
| Wirsung's canal | The excretory duct of the pancreas that extends through the gland from tail to head where it empties into the duodenum at the greater duodenal papilla. Synonym: ductus pancreaticus, Hoffmann's duct, Wirsung's canal, Wirsung's duct. (05 Mar 2000) |
| condylar canal | The inconstant opening through the occipital bone posterior to the condyle on each side that transmits the occipital emissary vein. Synonym: canalis condylaris, posterior condyloid foramen. (05 Mar 2000) |
| pleural canal | The portion of the embryonic celom that joins the pericardial cavity to the peritoneal cavity, developing into the pleural cavities. Synonym: pleural canal. (05 Mar 2000) |
| pleuroperitoneal canal | The communication between the embryonic pleural and peritoneal cavities. (05 Mar 2000) |
| musculotubal canal | A canal beginning at the anterior border of the petrous portion of the temporal bone near its junction with the squamous portion, and passing to the tympanic cavity; it is divided by the cochleariform process into two saemicanals: one for the auditory (eustachian) tube, the other for the tensor tympani muscle. Synonym: canalis musculotubarius. (05 Mar 2000) |
| Corti's canal | The spiral canal in the organ of Corti, formed by the outer and inner pillar cells or rods of Corti; it is filled with fluid and occasionally crossed by nonmedullated nerve fibres. Synonym: Corti's canal. (05 Mar 2000) |
| Cotunnius' canal | aqueduct of vestibule |
| craniopharyngeal canal | A tubular outgrowth of ectoderm from the stomodeum of the embryo; it grows dorsad toward the infundibular process of the diencephalon, around which it forms a cup-like mass, giving rise to the pars distalis and pars juxtaneuralis of the hypophysis. Synonym: craniopharyngeal canal, hypophyseal pouch, Rathke's diverticulum, Rathke's pocket, Rathke's pouch. (05 Mar 2000) |