Effects of Fe³⁺ on Acute Toxicity and Regeneration of Planarian (Dugesia japonica) at Different Temperatures

Figure 1

The poisoning pattern of the planarian on Fe³⁺. (a) The normal form of the planarian in clear water, naturally stretched; (b) the initial poisoning form of the planarian, the body is distorted, showing an “S” shape; (c-d) the head of the planarian is more sensitive, and the head disintegrates after the body is distorted; (e-f) as time goes by, the whole body of the planarian is completely decomposed, showing a diffuse, flocculent shape.

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