Normal Histology | Histology Image Gallery | Parathyroid Gland

Humans most often have four parathyroid glands, but variations are common. The parathyroid gland consists of two types of cells, the parathyroid chief cells, which are dark staining, smaller in size and more abundant. The chief cells make parathyroid hormone, PTH. The other cells, the lighter staining cells, which are larger but less abundant than the chief cells, are the oxyphil cells which do not have a known function.

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