. Quarterly journal of experimental physiology and cognate medical sciences. MCallum and others). The internal are embedded in the thyroidsubstance, lying either in the upper or middle third of each lateral the internal and external parathyroids have a compact appearance,consisting of small epithelium-like cells. Their nuclei are about 5/x indiameter, and contain fine granules of chromatin. The blood-vessels areconvoluted. Xo vesicular arrangement of the cells is apparent. A thincapsule of connective tissue surrounds each parathyroid and separates theinternal parathyroid from the thy
. Quarterly journal of experimental physiology and cognate medical sciences. MCallum and others). The internal are embedded in the thyroidsubstance, lying either in the upper or middle third of each lateral the internal and external parathyroids have a compact appearance,consisting of small epithelium-like cells. Their nuclei are about 5/x indiameter, and contain fine granules of chromatin. The blood-vessels areconvoluted. Xo vesicular arrangement of the cells is apparent. A thincapsule of connective tissue surrounds each parathyroid and separates theinternal parathyroid from the thyroid substance. 348 Kojima Operative Procedures. The operations for removal of portions of thyroid and parathyroidhave been described in a former paper, and the description need not berecapitulated. Microscopic Examination of the removed and remaining Thyroid and Parathyroids. Thyroid.—The removed thyroids are of normal appearance, and thedescription which has just been given will apply to them completely. Thyroid Remainders. — The size of these is obviously increased. I- _jiK. __ Fjq, 1.—Section of normal thyroid of dog (male) removed by operation, fixedwith 10 per cent, formol and embedded in celloidin. Microjjhotograph ;magnified 75 diameters H*matoxylin-eosin preparation. The vesicles are full of colloid, which is stained faintly by the hsema-toxylin-eosin. The lining epithelium cells are cubical. if calculated from the size of the part removed. For although onlyabout one-third of each lobe was left at the operation, what is now presentwould certainly be equivalent in size to at least one-half. Even the low power shows striking changes in the structure (lig. 2).The section appears like a number of tubules cut irregularly rather thana collection of vesicles. The size and shape of these tubules vary con-siderably. Generally speaking they are irregular, some of them are empty, but some contain a small amount of a colloid which stainsfaintly red by eosin an
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Keywords: ., bookcentury1900, bookdecade1900, bookidqua, booksubjectphysiology
