pars tensa

pars tensa,

the thick and taut part of the tympanic membrane. See also pars flaccida.

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pars

pl. partes [L.] a division or part.

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pars ciliaris retinae

see ciliary body.

pars distalis

the major part of the anterior lobe of the pituitary gland, the adenohypophysis. It is separated from the neurohypophysis by the intraglandular cleft, the residual lumen of Rathke's pouch.

pars disseminata

the thin layer of the prostate that surrounds the urethra; as distinct from the body of the gland.

pars flaccida

the small, triangular portion of the tympanic membrane lying between the lateral process of the malleus and the margins of the tympanic incisure.

pars infundibularis

the neural stalk that connects the neurohypophysis with the hypothalamus.

pars intermedia

the part of the adenohypophysis consisting of a layer of cells contiguous with the neurohypophysis. The source of melanocyte-stimulating hormone.

pars iridica retinae

see iris¹.

pars longa glandis

the long, cylindrical part of the dog glans; distinct from the bulbar part.

pars major uteri

the section of the bird's oviduct in which the egg is held while the shell is formed.

pars mastoidea

the mastoid portion of the temporal bone, being the irregular, posterior part.

pars nervosa

of the pituitary gland. See neurohypophysis.

pars optica retina

the large, posterior part of the retina which contains the nervous elements of rods, cones and optic nerve fibers.

pars petrosa

the petrous portion of the temporal bone, containing the inner ear.

pars pigmentosa

the pigmented part of the retina.

pars plana

the thin flat part of the ciliary body; the ciliary disk.

pars plicata

the folded part of the ciliary body.

pars pylorica

distal segment of the stomach or abomasum, curved behind the omasum.

pars pylorica ventriculi

the distal (aboral) third of the stomach.

pars squamosa

the flat, scalelike, anterior and superior portion of the temporal bone.

pars tensa

the drumlike part of the tympanic membrane.

pars tuberalis

a layer of cells surrounding the neural stalk of the pituitary gland and forming part of the adenohypophysis.

pars tympanica

the tympanic portion of the temporal bone, forming the anterior and inferior walls and part of the posterior wall of the external acoustic meatus.