Which Bony Feature on the Fetal Skull Is Undeveloped?

The mastoid process

mastoid process
The mastoid process is located posterior and inferior to the ear canal, lateral to the styloid process, and appears as a conical or pyramidal projection. It forms a bony prominence behind and below the ear. It has variable size and form (e.g. it is larger in the male than in the female).
› Mastoid_part_of_the_temporal_bone
is a bony feature on the fetal/neonate skull is undeveloped (is smooth or flat) until the neck muscles develop sufficiently to...

Which bone's might be absent in the fetus?

In the adult skeleton the coxal bones have fused (ischium, pubic, and ilium), while in the fetal skeleton these bones have not fused.

How does the size of the fetal face compare to its cranium?

How does the size of the fetal face compare to its cranium? Face is foreshortened, overshadowed by the large cranium. Maxillae and mandible are very tiny. ... In the adult the cranium is proportionately smaller and the facial bones are proportionately larger and more prominent.

Robert Thorne

Robert Thorne

Automotive & Future Transportation Editor

Robert Thorne covers electric vehicle innovations, autonomous driving systems, global mobility trends, and automotive engineering developments.