The middle layer cell won't degenerate when the tapetum disintegrates prematurely, This proves the hypothesis that the middle layer cells offer nutrients for the tapetum.
绒毡层的提前解体导致不育系花药的中层细胞不退化，为证明中层为绒毡层供给营养的假说提供了证据。
The surrounding cells of the embryonic cell groups degenerate, such there is the space between the groups of cell and the surrounding tissue.
并多数发生于于叶与下胚轴的深层。胚性细胞团周围细胞退化，使其与周围组织之间形成间隙。
Subependymal nodules can degenerate into giant cell astrocytomas that can result in obstruction at the foramen of Monro with obstructive hydrocephalus.
室管膜下结节可以变性为巨细胞星形细胞瘤导致Monro孔闭塞引起梗阻性脑积水。
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