The scalp of the fetus consists of five layers.
· The skin
· A subcutaneous tissue: Contains blood vessels and hair follicles. Is the part where caput succedaneum is formed.
· A layer of Tendon – Galea
· A loose layer of alveolar tissue. Limits movement of the scalp over the skull.
· The pericranium – is the periosteum of the cranial bones which covers the outer surface, and is adherent to their edge.
Cephalhaematoma is limited to the layer over the bones where it lays because it is attached to the edge of the bone.