What must be released in order for males to develop secondary sex characteristics?

A. spermatid: This is the stage where spermiogenesis occurs, which is the physical transformation of a non-motile round cell into a specialized spermatozoon. During this phase, the cell develops a flagellum, or tail, condenses its nucleus, and forms an acrosomal cap. It is a morphogenetic process rather than a cellular division.

B. primary spermatocyte: This diploid cell is prepared to undergo meiosis 1 to reduce the chromosome count. At this stage, the cell is large and spherical, lacking any specialized locomotory structures like a flagellum. Its primary physiological focus is DNA replication and genetic recombination through synapsis and crossing over.

C. spermatogonium: These are the stem cells of the germline located on the basement membrane of the seminiferous tubules. They undergo mitosis to maintain the cell population but do not possess any characteristics of a mature sperm cell. They are simple cuboidal epithelial cells with no flagellar precursors or tail structures.

D. secondary spermatocyte: These haploid cells are the products of the first meiotic division and are destined to undergo meiosis 2. They remain spherical in shape and do not yet initiate the morphological changes required for swimming. The development of the tail is reserved for the post-meiotic differentiation phase.

A. false: In a typical anteverted and anteflexed position, the uterus sits superior to and slightly posterior to the urinary bladder. The body of the uterus rests upon the superior surface of the bladder, which is why a pregnant uterus can put pressure on the bladder, increasing urinary frequency. The bladder is the most anterior of the pelvic viscera.