Increase in size following emergence from hibernation may be due in part to proliferation of the sustentacular cytoplasm.
The sustentacular cytoplasm has a less compact arrangement in late May than in April.
The lumina are filled with cellular detritus and are no longer bordered by a clear ring of sustentacular cytoplasm.
sustentacular sus·ten·tac·u·lar (sŭs'tən-tāk'yə-lər, -těn-)
Serving to support.