Definition
A *foramen* is simply an opening or hole in a bone or membrane. Think of it as a tunnel or a passageway through a structure. 🕳️ Blood vessels, nerves, and ligaments often pass through these foramina. Foramina exist throughout the body. For example, the *foramen magnum* is the large opening at the base of the skull. Each foramen serves a specific purpose, often allowing vital structures to connect different areas.