sinus urogenitalis |
A condition in which the urorectal fold has failed to divide the cloaca of the embryo into rectal and urogenital portions.
Synonym: sinus urogenitalis, urogenital sinus.
(05 Mar 2000) |
sinus venarum cavarum |
The portion of the cavity of the right atrium of the heart that receives the blood from the venae cavae; it is separated from the rest of the atrium by the crista terminalis.
Synonym: sinus venarum cavarum.
(05 Mar 2000) |
sinus venosus |
A cavity at the caudal end of the embryonic cardiac tube in which the veins from the intra-and extraembryonic circulatory arcs unite; in the course of development it forms the portion of the right atrium known in adult anatomy as the sinus of the vena cava.
Synonym: saccus reuniens.
Sinus venosus sclerae, the vascular structure encircling the anterior chamber of the eye and through which the aqueous is returned to the blood circulation.
Synonym: circular sinus, Fontana's canal, Lauth's canal, Schlemm's canal, sinus circularis, venous sinus of sclera.
(05 Mar 2000) |
sinus venosus syndrome |
<syndrome> The association of partial anomalous, pulmonary-venous connection, and a small venosus ASD.
(05 Mar 2000) |
sinus vertebrales longitudinales |
longitudinal vertebral venous sinus |
sphenoidal sinus |
One of a pair of paranasal sinuses in the body of the sphenoid bone communicating with the upper posterior nasal cavity or spenoethmoidal recess.
Synonym: sinus sphenoidalis.
(05 Mar 2000) |
sphenoidal sinus aperture |
One of the pair of openings in the body of the sphenoid bone through which the sphenoid sinuses communicate with the sphenoethmoidal recess of the nasal cavity.
Synonym: apertura sinus sphenoidalis, sphenoidal sinus aperture.
(05 Mar 2000) |
sphenoparietal sinus |
A paired dural venous sinus beginning on the parietal bone, running along the sphenoidal ridges and emptying into the cavernous sinus.
Synonym: sinus sphenoparietalis, Breschet's sinus, sinus alae parvae.
(05 Mar 2000) |
splenic sinus |
An elongated venous channel, 12 to 40 um wide, lined by rod-shaped cells.
Synonym: sinus lienis.
Straight sinus, an unpaired dural venous sinus in the posterior part of the falx cerebri where it is attached to the tentorium cerebelli; it is formed anteriorly by the merging of the great cerebral vein with the inferior sagittal sinus, and passes horizontally and posteriorly to the confluence of sinuses.
Synonym: sinus rectus, tentorial sinus.
(05 Mar 2000) |
nerve to carotid sinus |
<anatomy, nerve> A branch of the glossopharyngeal nerve that innervates the baroreceptors in the wall of the carotid sinus and the chemoreceptors in the carotid body.
Synonym: ramus sinus carotici, carotid sinus branch, Hering's sinus nerve, intercarotid nerve, nerve to carotid sinus, sinus nerve of Hering.
(05 Mar 2000) |
nonphasic sinus arrhythmia |
Sinus arrhythmia in which variations in rhythm are not related to the phases of respiration.
(05 Mar 2000) |
sulcus for transverse sinus |
The groove on the inner surface of the occipital bone marking the course of the transverse sinus; the tentorium is attached to its margins.
Synonym: sulcus sinus transversi, sulcus for transverse sinus.
(05 Mar 2000) |
sulcus sinus petrosi inferioris |
A groove lodging the inferior petrosal sinus, formed by union of similarly named grooves in the petrous part of the temporal bone and the basilar part of the occipital bone.
Synonym: sulcus sinus petrosi inferioris, inferior petrosal groove, inferior petrosal sulcus.
(05 Mar 2000) |
sulcus sinus petrosi superioris |
A groove on the crest of the petrous portion of the temporal bone in which rests the superior petrosal sinus.
Synonym: sulcus sinus petrosi superioris, superior petrosal sulcus.
(05 Mar 2000) |
sulcus sinus sagittalis superioris |
The groove in the midline of the inner table of the calvaria lodging the superior sagittal sinus.
Synonym: sulcus sinus sagittalis superioris, sagittal groove, sagittal sulcus, superior longitudinal sulcus.
(05 Mar 2000) |