Question

Label a skeletal diagram (cranial and postcranial) - see handout on Blackboard for all the bones you need to know

What's the difference between the pelvis and the innominate?
Where are the ischium, ilium, and pubis?

Answer 1

The pelvis encompasses the entire structure of the pelvic girdle and cavity while the innominate bone, or hip bone, is just one component of the pelvis. The innominate is composed of three fused bones: the ilium at the upper part, the ischium at the lower back, and the pubis at the front.

Step-by-step explanation:

Difference Between Pelvis and Innominate

The term pelvis refers to the entire structure that comprises the pelvic girdle and the pelvic cavity, including the sacrum, coccyx, and the two hip bones. Whereas, the innominate bone, also known as the hip bone or coxal bone, is a large, flat bone that is one of the components of the pelvis.

Locations of the Ischium, Ilium, and Pubis

The innominate bone itself is made up of three fused bones: the ilium, the ischium, and the pubis. The ilium is the uppermost and largest part of the hip bone, and its wing-like shape provides the prominence of the hips. The ischium forms the lower and back part of the hip bone, which you sit on. The pubis is the forward portion of the hip bone, located at the anterior of the pelvis. These bones converge at a deep socket called the acetabulum, which articulates with the head of the femur, forming the hip joint.