The human skull is made of 29 bones, connected most often by ligaments and a movable temporomandibular joint (articulatio temporomandibularis). The bones of the skull, which make up the brain (neurocranium) and facial part (splanchnocranium), are divided into even and odd ones. The frontal bone is the odd structure that makes up the part of the brain. Although in a child this bone is even, it heats up with time. Sometimes there is a suture on the bone, known as sutura metopica. During sex diagnostics, attention is paid to the expression of the frontal tumours and the shape of the glabella—it is a slight prominence lying in the median plane of the body between the browbones. It is the most forward point of the cranial vault. Between the frontal and parietal bones in children there is an anterior fontanelle (fonticulum anterior). It is on the midline of the skull at the intersection of the coronal suture, the sagittal suture and the frontal suture.