If you are a politician, that would probably be "proximity" but, the answer that you are probably looking for is "immovable joints". The skull is composed of around 22 bones but the only movable joints in an adult are the mandibular joints and the joint at the uppermost cervical vertebra, the "atlas". The pelvis of an adult human is, likewise, composed of the ilium, ischium, pubis and the os coxae. Those bones are all held together by immovable joints, too.
They are alike because they are both breakable
pelvis
Spine.
tendon
The Pelvis And The Skull .
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pelvis, spine and skull
Isn't it feet, skull, spine, pelvis, ribs, legs, and arms?
The ones that make up the pelvis and the skull.
the skull, pelvis, ribs, and scapula
Your skull, ribs, and pelvis are attached to your spinal column.
Fixed joints in humans are located in the skull and pelvis.
The major bones of the human body are Skull, Pelvis, And the Femur