| pars distalis | The larger part of the adenohypophysis composed of cords of epithelial cells individually specialised to secrete various tropic hormones that exert their effect on several target organs in the body. The secretory activity of these cells is under the control of either releasing or inhibiting factors elaborated by hypothalamic neurons and transported to the adenohypophysis by the hypothalamo-hypophysial portal system. Synonym: pars distalis. (05 Mar 2000) |
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| pars dorsalis pontis | The part of the pons bounded laterally by the middle cerebellar peduncles and anteriorly by the ventral part of pons; it is continuous with the tegmentum of the mesencephalon and contains long tracts such as the medial and lateral lemnisci, cranial nerve nuclei, and reticular formation. Synonym: pars dorsalis pontis, tegmentum of pons. (05 Mar 2000) |
| pars endocrina pancreatis | See: pancreas. (05 Mar 2000) |
| pars exocrina pancreatis | pars exocrina pancreatis |
| pars flaccida membranae tympani | Triangular loose part of tympanic membrane between the malleolar folds. Synonym: pars flaccida membranae tympani, flaccid membrane, membrana flaccida, Rivinus' membrane, Shrapnell's membrane. (05 Mar 2000) |
| pars foetalis placentae | <embryology> Placenta foetalis, the chorionic portion of the placenta, containing the foetal blood vessels, from which the funis develops; specifically, in humans, it develops from the chorion frondosum. Synonym: pars foetalis placentae. (05 Mar 2000) |
| pars frontalis corporis callosi | Frontal radiation of the corpus callosum; that part of the fibre radiation of the corpus callosum which bends forward toward the frontal pole of the cerebrum. Synonym: forceps minor, forceps anterior, frontal part of corpus callosum, pars frontalis corporis callosi. (05 Mar 2000) |
| pars glossopharyngea musculi constrictoris pharyngis superioris | See: superior constrictor muscle of pharynx. Synonym: pars glossopharyngea musculi constrictoris pharyngis superioris. (05 Mar 2000) |
| pars granulosa | The granular and filamentous part of the nucleolonema of the nucleolus. (05 Mar 2000) |
| pars hepatica | The larger cranial division of the primitive embryonic hepatic bud, developing into the liver proper. (05 Mar 2000) |
| pars horizontalis duodeni | pars horizontalis duodeni, inferior part of duodenum, pars inferior duodeni |
| pars inferior | The lowermost portion of a structure relative to the other parts; portion closest to the soles of the feet. See: inferior part of duodenum, inferior part of lingular branch of left pulmonary vein, inferior part of vestibular ganglion. Synonym: pars inferior. (05 Mar 2000) |
| pars inferior duodeni | pars horizontalis duodeni, inferior part of duodenum, pars inferior duodeni |
| pars inferior ganglii vestibularis | The lower part of the vestibular ganglion that receives fibres from the macula of the saccule and the ampulla of the posterior saemicircular duct. Synonym: pars inferior ganglii vestibularis. (05 Mar 2000) |
| pars inferior rami lingularis | An alternate term for inferior part of lingular branch of left pulmonary vein. (05 Mar 2000) |