The anterior angle of the superior surface of the urinary bladder. The apex of urinary bladder is connected to the umbilicus by the urachus in embryos, and by the median umbilical ligament, a remnant of urachus, in adults. [ doi:10.1016/j.mpsur.2013.04.013 http://www.ncbi.nlm.nih.gov/pubmed/31372192 doi:10.1016/j.mpsur.2016.04.001 ]