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the hindlimbs. The extent to which the tail of a bat is attached to a patagium can vary by species, with some having completely free tails or even no tails. For bat embryos, only the hindfeet experience apoptosis (programmed cell death), while the forefeet retain webbing between the fingers that become the wing membranes. These structures include connective tissue, elastic fibres, nerves, muscles, and blood vessels. The muscles

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