| pars infrasegmentalis | A vein receiving blood from adjacent bronchopulmonary segments; it emerges from the inferior margin of a segment to become a tributary of a branch of a pulmonary vein. Synonym: infrasegmental part, intersegmental part of pulmonary vein, pars infrasegmentalis. (05 Mar 2000) |
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| pars infundibularis | <anatomy> The upward extension of the anterior lobe that wraps around the infundibular stalk; its cells, mostly gonadotropic, are arranged in cords and clusters; it is supplied by the superior hypophyseal arteries and contains the first capillary bed and the venules of a portal system that carries neurosecretory factors from the hypothalamus to a second capillary bed in the adenohypophysis where they regulate the release of hormones. See: hypophysis. Synonym: infundibular part, pars infundibularis. (05 Mar 2000) |
| pars insularis | pars insularis |
| pars insularis arteriae cerebralis mediae | pars insularis arteriae cerebralis mediae |
| pars interarticularis | The segment of bone between the superior and inferior articular facets, especially in the lumbar spine. (05 Mar 2000) |
| pars intercartilaginea rimae glottidis | The opening between the vocal processes of the arytenoid cartilages. Synonym: pars intercartilaginea rimae glottidis, glottis respiratoria, intercartilaginous part of glottic opening. (05 Mar 2000) |
| pars intermedia | Central portion; the portion located between extreme portions of a structure; an interposed or intervening part. See: intermediate part of adenohypophysis, intermediate part of vestibular bulb. Synonym: pars intermedia. (05 Mar 2000) |
| pars intermedia adenohypophyseos | The part of the adenohypophysis located between the pars distalis and the nervous lobe; poorly developed in humans. Synonym: pars intermedia adenohypophyseos. (05 Mar 2000) |
| pars intermedia bulborum | A narrow median band that connects the two masses of erectile tissue (the bulbus vestibuli) on either side of the vaginal orifice. Synonym: pars intermedia commissura bulborum, commissura bulborum, intermediate part of vestibular bulb, pars intermedia bulborum. (05 Mar 2000) |
| pars intermedia commissura bulborum | A narrow median band that connects the two masses of erectile tissue (the bulbus vestibuli) on either side of the vaginal orifice. Synonym: pars intermedia commissura bulborum, commissura bulborum, intermediate part of vestibular bulb, pars intermedia bulborum. (05 Mar 2000) |
| pars intermembranacea rimae glottidis | The portion of the opening anterior to the vocal processes of the arytenoid cartilages bounded by the vocal ligaments. Synonym: pars intermembranacea rimae glottidis, glottis vocalis, intermembranous part of glottic opening. (05 Mar 2000) |
| pars intersegmentalis | pars intersegmentalis |
| pars intracanaliculus nervi optici | <anatomy, nerve> The part of the optic nerve lying within the optic canal. Synonym: pars intracanaliculus nervi optici. (05 Mar 2000) |
| pars intracranialis arteriae vertebralis | See: vertebral artery. (05 Mar 2000) |
| pars intracranialis nervi optici | <anatomy, nerve> The portion of the optic nerve between the optic canal and the optic chiasm. Synonym: pars intracranialis nervi optici. (05 Mar 2000) |