Bony pelvis Composition: formed by paired hip bones, sacrum, coccyx, and their articulations Two portions Greater pelvis · Lesser pelvis Terminal line( pelvic inlet) formed by promontory of sacrum arcuate line, pecten of pubis pubic tubercle, upper border of pubic symphysis Pelvic outlet: formed by tip of coccyx, sacrotuberous lig ischial tuberosity, ramus of ischium, inferior ramus of pubic symphysisBony pelvis Composition: formed by paired hip bones, sacrum, coccyx, and their articulations Two portions • Greater pelvis • Lesser pelvis – Terminal line ( pelvic inlet): formed by promontory of sacrum, arcuate line, pecten of pubis, pubic tubercle, upper border of pubic symphysis – Pelvic outlet: formed by tip of coccyx, sacrotuberous lig. ischial tuberosity, ramus of ischium, inferior ramus of pubic symphysis