Spermiogenesis is the final stage of spermatogenesis in which haploid spermatids undergo extensive morphological changes to become mature, spermatozoa. During this process, the spermatids develop into elongated, mobile cells with a head, midpiece, and tail, which are essential for fertilization. Spermiogenesis involves chromatin condensation, acrosome formation, flagellum development, and reshaping of cellular organelles to produce highly specialized sperm cells.