The pelvic girdle

The pelvic girdle consists of two hip bones which are joined together at the back by the sacrum and at the front by the symphysis pubis.

Each hip bone consists of three separate bones which are fused together. They are the:

ilium

ischium

pubis.

Pelvic bone

Position

Description

Ilium

Forms superior (upper part) of the pelvic girdle

The largest and most superior pelvic bone in the pelvic girdle

Upper border is iliac crest; an important site of attachment for muscles of the anterior and posterior abdominal walls

Ischium

Forms the inferior (lower) and posterior (back) part of pelvic girdle

The ischial tuberosity is a bony protrusion which is the part of the ischium that you sit on

It receives the weight of the body when sitting and provides muscle attachments for the muscles such as the hamstrings and the adductors

Pubis

Collective name for the two pubic bones in the most anterior (front) portion of the pelvis

Two pubic bones resemble a wishbone and are linked via a piece of cartilage called the symphysis pubis

The pubic bones provide attachment sites for some of the abdominal muscles and fascia

Functions of the pelvic girdle

Like the vertebral column, the pelvic girdle mirrors the primary functions of the skeleton - it has a role in supporting the vertebral column and the body's weight and offers protection by encasing delicate organs such as the uterus and bladder.

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