这个词是什么意思？
The single layer of pigment-containing epithelial cells in the RETINA, situated closely to the tips (outer segments) of the RETINAL PHOTORECEPTOR CELLS. These epithelial cells are macroglia that perform essential functions for the photoreceptor cells, such as in nutrient transport, phagocytosis of the shed photoreceptor membranes, and ensuring retinal attachment.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D055213 · MeSH 2026。
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