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Adaptations to desert life include broad, flat, thick-soled two-toed feet that do not sink into the sand; the ability to go without drinking for several daysÑor longer if juicy plants are available; and valvular nostrils lined with hairs for protection against flying sand. Horny pads help to protect the chest, knees, and thigh joints against injury from the hard surfaces on which the camel sleeps.
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