. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. ded into still smallerlobules, giving it a coarse-ly granular is grayish-red in color,slightly translucent, andsometimes mottled by yel-lowish or brownish section, a thick glairyfluid (colloid) exudes insmall quantity upon thesurface, making it appearmoist and examined with alow power under the mi-croscope, this fluid is seento have come from innu-merable minute closedvesicles ranging in di-ameter from to , beco
. A Reference handbook of the medical sciences : embracing the entire range of scientific and practical medicine and allied science. ded into still smallerlobules, giving it a coarse-ly granular is grayish-red in color,slightly translucent, andsometimes mottled by yel-lowish or brownish section, a thick glairyfluid (colloid) exudes insmall quantity upon thesurface, making it appearmoist and examined with alow power under the mi-croscope, this fluid is seento have come from innu-merable minute closedvesicles ranging in di-ameter from to , becoming relativelylarger as age advances,and being separated from eachother by fine septa of connec-tive tissue containing numer-ous nuclei. The wall of each vesicle is linerl with f FlG- 3021.—Relations of the Thyroid Gland to the Neighboring Pitinea Wim a, Single layer 01 ^ Vena cava superior. 2, trunk of left brachiocephalic vein ; 3, cubical epithelial cells, hav semi-fluid colloid material, detached epithelial cells, leu-cocytes, and red blood-corpuscles in various stages of degeneration, are some-. times seen, but are not,strictly speaking, normal-ly present, being reallyproducts of interstitial connectivetissue between the vesiclesalso frequently containsplasma cells, and the areo-lar spaces are often infil-trated with colloid sub-stance similar to thatfound within the has describedthe gland as consisting ofa cortical portion in whichthe development is incom-plete, the epithelial cellsbeing arranged in solidelongated clusters or col-umns, and a medullaryportion where the glandis fully developed, and allthe cells are arranged toform vesicles. The exist-ence of a limited numberof epithelial columns inthe medullary part of thegland, regarded by Vir-chow as evidences of atrue tubular racemose ar-rangement or connectionbetween the vessels, is ac-counted for by Wolfler asthe persistence of the gland-tissue in its embryonic formbetween the more
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectmedicine, bookyear188
