The occipital bone is most posterior.
Ethmoid
The mastoid process is located at the base of the skull and posterior to the ear.
A skull (very funny) the bone behind your ear is called the mastoid process. the mastoid bone is the most posterior part of the temporal bone of your skull.
a fused bone is located in you skull and in your sacrum and coccyx( tail bone)
The temporal bone is located in the skull, and the skull consists of flat bones so yes, it is a flat bone
Occipital Bone
The mandible is located on your skull. It is attached to your skull. It is called your JAW.
There are two joints at the base of the skull: - a condyloid joint between the occipital bone of the skull and the first (C1) vertebra, the atlas. - a pivot joint located between the C1 and C2 cervical vertebrae (atlas and axis).
Ethmoid
The sphenoid bone is one of the skull bones and is located relatively deep within the skull. It is only very slightly visible from an exterior view of the skull. Looking side on to a skull it is right between the temporal bone and the zygomatic bone, in other words it is the small section beneath the Pterion. It is also visible when looking into the orbit (with the eye removed) as the bone with the superior orbital fissure through it.
There are many bones that make up the skull. the occupital bone is the back of your skull. the frontal bone is also known as the forehead. and the pariatal bones are located on the left and right sides of the skull. see picture for more info. becomehealthynow.com/images/organs/bones/skull_bones_side_view.jpg
The purpose of the mastoid process is to function as an attachment for particular muscles of the neck. It is situated in the posterior part of the temporal bone.