What is the primary function of fontanels in an infant's skull?

• A. To protect the brain from damage
• B. To allow for brain growth
• C. To support metabolic functions
• D. To regulate intracranial pressure

Answer: (B)

The primary function of fontanels in an infant's skull is to allow for brain growth. Fontanels are the soft spots on a baby's head where the skull bones have not yet fused together. This flexibility is vital during the early months and years of life when the brain is rapidly growing and developing. As the infant's brain grows, it requires adequate space, and the presence of fontanels accommodates this growth. Eventually, the skull bones will fuse as the child matures, providing a stable and protective structure for the brain.

While fontanels do offer some degree of protection and may play a role in managing intracranial pressure, their primary purpose is to facilitate the necessary expansion of the brain during early development. Supporting metabolic functions is not a role associated with the fontanels, as they primarily serve as gaps between skull bones rather than being involved in metabolic processes.