annulus


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Related to annulus: Annulus fibrosus, Annulus of Zinn

annulus

 [an´u-lus] (pl. an´nuli) (L.)
alternate spelling of anulus.

annulus

/an·nu·lus/ (an´u-lus) pl. an´nuli   [L.] anulus.

annulus

(ăn′yə-ləs)
n. pl. annu·luses or annu·li (-lī′)
1. A ringlike figure, part, structure, or marking, such as a growth ring on the scale of a fish.
2.
a. A ring or group of thick-walled cells around the sporangia of many ferns that functions in spore release.
b. The ringlike remains of a broken partial veil, found around the stipes of certain mushrooms.

annulus

annulus

Any ring-like structure (e.g., mitral valve annulus).

annulus

Any ring-like structure.

annulus

  1. the ring of cells in the moss or fern capsule which splits to allow the liberation of spores.
  2. a ring of tissue surrounding the stalk in the fruiting bodies of the BASIDIOMYCOTA fungi.

annulus, anulus

pl. annuli, anuli [L.] a small ring or encircling structure.

atrioventricular annulus
a ring of Purkinje cells around the right A-V orifice that serves the myocardium and valves locally and also serves as an alternative connection between the atria and the ventricles.
fibrocartilaginous annulus
the circular pad which connects the tympanic membrane to the external acoustic meatus.
annuli fibrosi
1. four fibrous rings at the base of the heart to which the myocardium is attached, one around each A-V orifice and one each around the aorta and the pulmonary artery.
2. the intervertebral disks consist of a soft central pulpy nucleus and a peripheral annulus fibrosus.
annulus iridis
the iris consists of two rings, an inner smooth annulus iridus minoris, and an outer plicated part, the annulus iridis major.
annulus preputialis
the ring of skin marking the entrance to the cavity of the prepuce.
annulus sclerae
a roll of connective tissue on the inside of the sclera at the corneoscleral junction.
spermatic annulus
a small ring condenses around the proximal centriole of the spermatid.
annulus vaginalis
the ring through which the peritoneal cavity connects with the cavity of the vaginal tunic.
References in periodicals archive ?
10],[11] Proteoglycan aggregates in adult human nucleus pulposus are mainly distributed within the extracellular matrix, while those of the annulus fibrosis are mainly distributed between collagen fibers.
annulus strain based on: geographical location (Larat and Ambon Island), harvest periods or seasons for four seasons (2013, 2014, 2015 and 2016) and shell development stages such as: juvenile stage, sub adult, adult and post adult.
During transcanal surgery, the facial nerve is mainly sensitive at the posteroinferior quadrant because the annulus is not a steady landmark for the facial nerve.
marginal increment analysis), confirming location of the birthmark, and correlations between growth and annulus deposition.
Past studies have reported that Atlantic surfclams Spisula solidissima form one annulus per year in the fall, and thus annuli can be counted to determine the year class of the surfclam and final age can be assigned precisely relative to when the last annulus was formed (Almeida & Sheehan 1997).
The discrepancy in ages between structures is presumed to be related to difficulty in finding the first annulus.
are also comparable, since they also exhibit a smooth pileus, partial veil producing a membranous annulus or a fibrillose annular zone, two or four spored basidia, as well similar pleuro- and cheilocystidia (Noordeloos, 2011).
Based on this angiogram pulmonary valve annulus measured and balloon size 30% more than actual annulus was selected in most of the cases.
RF Received Power due to the Transmitters Located within the Annulus I.
As the elevation of the flap procedes medially complete annulus was elevated by 2700 degree from the bony annulus.
The disc joint is composed of three major parts: cartilaginous vertebral endplates that cap the bodies of the vertebrae, a fibrous annulus fibrosus that is located circumferentially between the vertebral bodies, and a thick gel-like nucleus pulposus in the center bounded by the fibers of the annulus fibrosus.