Apd, Main Cranial Bones And Sutures

Front 1

Joins the frontal bone to the two parietal bones

Back 1

coronal suture

Front 2

Bone that closes the anterior part of the cranial cavity and forms the skeleton of the forehead

Back 2

frontal bone

Front 3

Joins the two parietal bones to the occipital bone

Back 3

lambdoid suture

Front 4

Bone situated at the posterior and inferior part of the cranium; articulating with the two parietal and two temporal bones

Back 4

occipital bone

Front 5

Bones forming part of the superior and lateral surfaces of the skull, and joining each other in the midline at the sagittal suture

Back 5

parietal bones

Front 6

Joins one parietal bone to the other parietal bone

Back 6

sagittal suture

Front 7

Joins the parietal bones to the temporal bones

Back 7

squamous suture

Front 8

Bones forming part of the lateral surfaces and the base of the skull, and containing the organs of hearing

Back 8

temporal bones

Front 9

Comment:

Back 9

After birth, the bones of the cranium continue to grow until the fontanels are no longer present. The posterior and anterolateral fontanels usually fill in 2–3 months after birth. The posterolateral fontanels usually fill in at the end of the first year. The anterior fontanel (the largest fontanel) usually fills in by the middle of the second year after birth.

Front 10

The cranial bones consist of:

Back 10

frontal bone
parietal bones
occipital bone
temporal bones

Front 11

The sutures that join these bones together are:

Back 11

coronal suture
squamous suture
lambdoid suture
sagittal suture