What is the most caudal bone in the pelvis?

The most caudal bone in the pelvis is indeed the pubis. In anatomical terms, "caudal" refers to the position toward the tail or the lower end of the vertebral column. The pelvis is composed of several bones, including the ilium, ischium, and pubis. Among these, the pubis is located at the front (ventral side) of the pelvis and is positioned lower than both the ilium and ischium. This makes it the most caudally positioned bone within the pelvic structure.

The ilium and ischium are both located higher in relation to the pubis, with the ilium being the largest and most superior, and the ischium being located behind and below the ilium. The femur, while important in the skeletal structure, is not a pelvic bone; it is the bone of the thigh that connects to the pelvis at the hip joint. Understanding the positioning of these bones within the anatomy of the pelvis helps clarify that the pubis is indeed the most caudal bone.