Review Article

Morphogenetic Mechanisms in the Cyclic Regeneration of Hair Follicles and Deer Antlers from Stem Cells

Figure 2

Ontogeny of HF and AU (for detailed descriptions, refer to the text). (a) Ontogeny of HF. (a)(1) Epithelial placode; (a)(2) bulbous peg; (a)(3) mature HF; (a)(4) HF at telogen; (a)(5) HF at anagen I; (a)(6) HF at anagen II; (a)(7) HF at early catagen; (a)(8) HF at telogen. (b) Ontogeny of AU. (b)(1) Fully grown pedicles; (b)(2) antler initiation from a fully grown pedicle; (b)(3) half-grown spike antlers; (b)(4) dead hard spike antlers; (b)(5) hard antler casting; (b)(6) antlers at mid regenerating stage; (b)(7) velvet skin shedding; (b)(8) hard regenerated antlers.
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(a) Hair follicle
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(b) Deer antler