How many bones are there in the human cranium ?

The human skull is composed of 22 bones, which are divided into the facial skeleton and the cranium (neurocranium). The cranium specifically consists of exactly eight bones that enclose and protect the brain [t1][t3]. These eight bones include four single (unpaired) bones: the frontal bone, the occipital bone, the sphenoid bone, and the ethmoid bone [t1][t6]. Additionally, there are two sets of paired bones: the parietal bones and the temporal bones, with one of each located on either side of the head [t1][t2]. While these bones start as separate soft structures in infants, they eventually fuse together by adulthood to form a rigid protective cavity [t1][t5]. The other 14 bones of the skull belong to the viscerocranium, which forms the facial structure [t4][t5].

Sources

1. [1] https://www.ncbi.nlm.nih.gov/books/NBK499834/