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The pelvic girdle does not include the sacrum and coccyx, which are part of the axial skeleton.
The sacrum is part of the skeletal system. It is a triangular bone located at the base of the spine, connecting the spine to the pelvis and providing support and stability to the torso.
The illium, ischium (that make up the pelvis) and sacrum are usually what I think of when I hear hip bones. There is a very nice map of the human skeleton in the link below.
skeleton.
The Spine
The axial skeleton attaches to the pelvic girdle at the sacrum, which is a triangular bone located at the base of the spine. The sacrum connects the spine to the hip bones, forming the sacroiliac joints. This connection provides support and stability to the entire body.
The ala of the sacrum are paired extensions that help support the weight of the body and provide attachment points for ligaments and muscles. They articulate with the ilium at the sacroiliac joint, forming a stable connection between the axial skeleton and the pelvis. The ala also contribute to the overall strength and stability of the sacrum, especially during weight-bearing activities.
The tibia is not a part of the coxal bone. The coxal bone is also known as the hip bone and is made up of three fused bones: ilium, ischium, and pubis. The tibia is a separate bone located in the lower leg.
Sacrum
sacrum.
sacrum.
Yes, the sacrum is part of the axial region of the body. It is a triangular bone located at the base of the spine, connecting the lumbar vertebrae to the coccyx and forming the back part of the pelvis. The axial skeleton includes the skull, vertebral column, ribs, and sternum, with the sacrum being a key component of the vertebral column.