Atlas of Human Anatomy by Netter

[Plate 335, Bones and Ligaments of Pelvis]

Bones and Boundaries of the Pelvis

Bony pelvis

Is a strong ring

Supports the weight of the body

Provides attachment for powerful muscles that move the lower limb

Composed of four bones

Two hip bones or innominate bones

Sacrum-five fused sacral vertebrae

Coccyx-four (+ 1) fused coccygeal vertebrae

Hip or innominate bones each formed from

Ilium

Ischium

Pubis

Fuse at puberty

Are united by cartilage at the acetabulum

Pelvic girdle

Is formed of hip bones and sacrum

Transmits weight from upper body to lower limbs

Pelvic walls

Formed by bones of bony pelvis, ligaments, muscle, and fascia

Surround pelvic cavity

Pelvic cavity
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Basin shaped

Surrounded by bony pelvis