Irregular Bones

What do Unusual Bones look like

Unusual bones, as their name implies, have distinct shapes that cannot be categorized as long, short, or flat bones.

Similar to short bones, unusual bones primarily consist of spongy bone tissue, with a layer of compact bone forming the outer layer.

Table of Unusual Bones in the Body

Unusual Bones

In the vertebral column

  • All the vertebrae (cervical, thoracic, lumbar)
  • Sacrum
  • Coccyx

In the skull

  • Temporal
  • Sphenoid
  • Ethmoid
  • Zygomatic
  • Maxilla
  • Mandible
  • Palatine
  • inferior nasal concha
  • Hyoid


  • These bones provide stability and shape to the spinal column and parts of the head and face.
  • The bones in the vertebral column, especially the sacrum, offer multiple attachment points for the skeletal muscles and tendons, which maintain the back and pelvic region’s flexibility, allowing movement.


  1. Unusual Bones –
  2. Unusual bones –
  3. Types of Bone –
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