Manual of human histology . pithelium, often pale and as if half dissolved, thatit is impossible to avoid the conclusion, that in these cells wehave an instance of that post mortem decomposition, so fre-quently observed in the human subject. On the other hand,the pathological nature of the change in the thyroid bodj^ and itsvesicles, termed colloid, cannot be doubted, although this morbidcondition is so frequent, in certain minor degrees, that manyauthors enumerate it under the physiological occurrences. Inthis degeneration, there is deposited in the gland vesicles, whichincrease in size at th
Manual of human histology . pithelium, often pale and as if half dissolved, thatit is impossible to avoid the conclusion, that in these cells wehave an instance of that post mortem decomposition, so fre-quently observed in the human subject. On the other hand,the pathological nature of the change in the thyroid bodj^ and itsvesicles, termed colloid, cannot be doubted, although this morbidcondition is so frequent, in certain minor degrees, that manyauthors enumerate it under the physiological occurrences. Inthis degeneration, there is deposited in the gland vesicles, whichincrease in size at the same time, the colloid substance, whichalso occurs in other situations, in the form of transparent,amorphous, light yellowish, soft, solid, masses, by which theyare more or less In the lesser degrees of this change. Fig. 240. Some gland-vesicles from the thyroid gland of a Child, x 250 diam.:a, connective tissue between them ; b, membrane of the gland-vesicles; c, theirepithelium. 183 SPECIAL HISTOLOGY. Fig. the vesicles are but little enlarged, to as mucli as 0-05, in atransverse section, presenting the appearance of transparent yellowish-white spotsor granules, whichhave been very aptlycompared, by Ecker,with boiled sago, andotherwise retainingthe usual a higher degree,the vesicles contain-ing colloid are trans-formed into largercysts, of ^—f, _ inwhich the epitheliumis rarely any longerdistinct, but, together with the abnormal contents, rounded,pale cells, filled with colloid matter or granules, and nuclei,may occur; these cysts compress the stroma and ultimately,owing to a partial absorption of the walls, coalesce into stilllarger sinuous cavities, the contents of which are afterwardsfrequently altered in various ways, by extravasations and theirmetamorphoses. In Mammalia and Birds, the thyroid bodyalso occasionally contains gland-vesicles slightly distended withcolloid matter. The blood-vessels of the thyroid gland are, as is well known,disp
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Keywords: ., bookcentury1800, bookdecade1850, booksubjecthistolo, bookyear1853
