I think they are called Sutural. Intra sutural bones also known as the wormian bones are extra bone pieces that occur within a suture (a joint) in the cranium. They are irregular isolated bones that appears in addition to the usual centers of ossification of the cranium and they are not rare bone despite being unusual.
Explanation:
The cell is the basic unit of life
Answer: The cell is eukaryotic because it contains mitochondria
Explanation: Because I said so but really this is the answer