Quain's elements of anatomy . 540 THE LAEYNX AND TEACHEA. decoloiirization. From this it is inferred that the thyroid body mayfoe concerned in producing retrogressive changes in the blood. In the interstitial connective tissue of the giand there occur a numberof cells similar to the plasma-cells of Waldeyer ( parenchyma-cells,Baber). The spaces (areolse) of this tissue may be filled with the samecolloid substance as that which occupies the vesicles. The blood-vesselsand lymphatics are conducted to the vesicles in the interstitial tissue, the. Fig. 462.—Section op the thyeoid gland of a chu,d (
Quain's elements of anatomy . 540 THE LAEYNX AND TEACHEA. decoloiirization. From this it is inferred that the thyroid body mayfoe concerned in producing retrogressive changes in the blood. In the interstitial connective tissue of the giand there occur a numberof cells similar to the plasma-cells of Waldeyer ( parenchyma-cells,Baber). The spaces (areolse) of this tissue may be filled with the samecolloid substance as that which occupies the vesicles. The blood-vesselsand lymphatics are conducted to the vesicles in the interstitial tissue, the. Fig. 462.—Section op the thyeoid gland of a chu,d () Two complete vesicles and portions of others are represented. The vesicles are filled?with colloid which also occupies the interstitial spaces. In the middle of one of thespaces a blood-vessel is seen cut obliquely, and close to it is a plasma-cell. Between thecubical epithelium cells, smaller cells like lymph-corpuscles are seen here and there. lymphatic vessels not coming into such intimate relations with the wallsof the vesicles as the blood-capillary network, the vessels of which are inclose contact with the epithelium and may even project between theepithelium-cells. Although the vesicles are as a rule quite distinct from each other in the adult,incompletely developed portions may here and there be found in which anasto-mosing cylinders of columnar cells occur-. One of the most frequent pathological changes to which the thyi-oid body issubject consists in the accumulation within its vesicles of colloid substance :in c
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