The Skull's Primary Functions: Support and Protection

Structural Support

The skull provides a rigid framework supporting and protecting the brain, eyes, ears, and nose. It maintains head shape and allows muscle/ligament attachment.

Protection

Acts as a protective helmet for the brain. Thick cranial bones absorb and disperse impact forces, reducing brain damage risk.

Attachment Sites for Muscles and Ligaments

Enables facial expressions, chewing, swallowing, eye movement, and other head/neck functions.

Sensory Function

Contains openings for sensory input/output: orbits (vision), auditory meatus (hearing), nasal cavity (smell). Foramina allow nerves and vessels to connect brain to body.

Production of Red Blood Cells

Bone marrow in flat skull bones produces red blood cells (hematopoiesis), essential for oxygen transport.

Cranial Cavities

Interior divided into three main cavities: cranium (brain), orbits (vision), nasal cavity (respiration), each housing and protecting specific structures.