The two parietal bones and the occiptal bone
A fetal skull has six fontanels: two anterior (sagittal and frontal) and four posterior (two squamous and two mastoid). These membranous gaps eventually close as the skull bones fuse together during infancy.
Spaces between skull bones that have not ossified usually occur from birth to age two and are called fontanels. By age two, the fontanels close and become sutures.
Fontanels
The fontanels of a baby skull are made of connective tissue. They are soft spots between the skull bones that allow for some flexibility during birth and rapid brain growth in the first year of life. Over time, these fontanels close as the bones of the skull fuse together.
Anterior (frontal) Fontanel Posterior (occipital) Fontanel Anterolateral (sphenoid) Fontanel Posterolateral (mastoid) Fontanel
Fontanels are a mesenchyme (loose connective tissue) filled space where bone formation is not yet complete, especially between the cranial bones of an infant's skull. Fontanels are replaced and covered by the growth of bone over that connective tissue in time, into a suture (an immovable joint) that connect the different portions of the skull.
A fontanel is a soft spot on a baby's head where the skull bones have not yet fused together. There are typically several fontanels on a newborn's head to allow for the baby's brain growth and development. Over time, these fontanels will close as the skull bones fully develop.
There are no soft bones, just incompletely ossified joints such as the fontanels of the skull and the growth plates of the long bones.
Fontanels, or soft spots, are spaces between the bones of an infant's skull that allow for growth and the passage through the birth canal. In adults, these soft spots have typically closed as the bones fuse together, forming a solid skull to protect the brain. However, in some cases, adults may still have remnants of fontanels due to variations in bone development, but these are usually much smaller and less pronounced. The presence of fontanels in adults is relatively rare and not a common characteristic.
where does two bones connect
The occiput, or occipital bones.
Temporal