CASP3 and cryptorchidism: In the second part of the study, we aimed at analyzing, in the same tracts of normal and cryptorchid canine epididymis, Hsp70 and caspase-3 expression by Western blotting, considering their possible relation to AQPs since channel proteins also regulate cell homeostasis in relation to a physiological process leading to cell death, apoptosis, which is a common characteristic of cryptorchidism.