| renal portal system | An arterial portal system, in which efferent glomerular arterioles receive blood from the capillaries of the renal glomeruli and carry it to the peritubular capillary plexus surrounding the proximal and distal convoluted tubules. Synonym: hypothalamohypophysial portal system. (05 Mar 2000) |
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| filling defect in renal collecting system | <radiology> Common causes: transitional cell carcinoma, blood clot, lucent calculus (urate) less common causes: fungus ball, sloughed papilla, fibroepithelial polyp, invasion by hypernephroma, malakoplakia, vessel impression, metastases (12 Dec 1998) |
| cardiac depressor reflex | A fall in blood pressure due to peripheral vasodilation and cardiac inhibition by stimulations of terminations of a cardiac depressor nerve in the aortic arch and base of the heart. Synonym: aortic reflex, depressor reflex. (05 Mar 2000) |
| musculus depressor anguli oris | <anatomy, muscle> Origin, lower border of mandible anteriorly; insertion, blends with other muscles in lower lip near angle of mouth; action, pulls down corners of mouth; nerve supply, facial. Synonym: musculus depressor anguli oris, musculus triangularis labii inferioris, musculus triangularis, triangular muscle. (05 Mar 2000) |
| musculus depressor labii inferioris | <anatomy, muscle> Origin, anterior portion of lower border of mandible; insertion, orbicularis oris musculus and skin of lower lip; action, depresses lower lip; nerve supply, facial. Synonym: musculus depressor labii inferioris, depressor muscle of lower lip, musculus quadratus labii inferioris, musculus quadratus menti. (05 Mar 2000) |
| musculus depressor septi | <anatomy> A vertical fasciculus from the orbicularis oris musculus passing upward along the median line of the upper lip, and inserted into the cartilaginous septum of the nose; action, depresses septum; nerve supply, facial. Synonym: musculus depressor septi, depressor muscle of septum. (05 Mar 2000) |
| musculus depressor supercilii | <anatomy> Fibres of the orbital part of the orbicularis oculi musculus insert in the eyebrow; action, depresses eyebrow; nerve supply, facial. Synonym: musculus depressor supercilii, depressor muscle of eyebrow. (05 Mar 2000) |
| depressor | 1. One who, or that which, presses down; an oppressor. 2. <anatomy> A muscle that depresses or tends to draw down a part. <physiology> Depressor nerve, a nerve which lowers the activity of an organ; as, the depressor nerve of the heart. Source: Websters Dictionary (01 Mar 1998) |
| depressor anguli oris | <anatomy, muscle> Origin, lower border of mandible anteriorly; insertion, blends with other muscles in lower lip near angle of mouth; action, pulls down corners of mouth; nerve supply, facial. Synonym: musculus depressor anguli oris, musculus triangularis labii inferioris, musculus triangularis, triangular muscle. (05 Mar 2000) |
| depressor fibres | Sensory nerve fibre's having pressure-sensitive nerve endings in the wall of certain arteries capable of activating blood pressure-lowering brainstem mechanisms when stimulated by an increase in intra-arterial pressure. (05 Mar 2000) |
| depressor labii inferioris | <anatomy, muscle> Origin, anterior portion of lower border of mandible; insertion, orbicularis oris musculus and skin of lower lip; action, depresses lower lip; nerve supply, facial. Synonym: musculus depressor labii inferioris, depressor muscle of lower lip, musculus quadratus labii inferioris, musculus quadratus menti. (05 Mar 2000) |
| depressor muscle of epiglottis | <anatomy, muscle> Origin, inner surface of thyroid cartilage in common with musculus thyroarytenoideus; insertion, aryepiglottic fold and margin of epiglottis; action, depresses base of epiglottis; nerve supply, recurrent laryngeal. Synonym: musculus thyroepiglotticus, depressor muscle of epiglottis, ventricularis. (05 Mar 2000) |
| depressor muscle of eyebrow | <anatomy> Fibres of the orbital part of the orbicularis oculi musculus insert in the eyebrow; action, depresses eyebrow; nerve supply, facial. Synonym: musculus depressor supercilii, depressor muscle of eyebrow. (05 Mar 2000) |
| depressor muscle of lower lip | <anatomy, muscle> Origin, anterior portion of lower border of mandible; insertion, orbicularis oris musculus and skin of lower lip; action, depresses lower lip; nerve supply, facial. Synonym: musculus depressor labii inferioris, depressor muscle of lower lip, musculus quadratus labii inferioris, musculus quadratus menti. (05 Mar 2000) |
| depressor muscle of septum | <anatomy> A vertical fasciculus from the orbicularis oris musculus passing upward along the median line of the upper lip, and inserted into the cartilaginous septum of the nose; action, depresses septum; nerve supply, facial. Synonym: musculus depressor septi, depressor muscle of septum. (05 Mar 2000) |