Answer:
Foramen magnum is a gap at the bottom of the skull near the anterior perspective of the occipital bone by which the spinal cord joins the cranium.
Step-by-step explanation:
The foramen magnum is a big oval hole (foramen) in the occipital ossein of the scalp in people and several other creatures. It is one of the various ovals or round openings (foramina) in the bottom of the scalp. The spinal cord, an expansion of the medulla, moves by the foramen magnum as it exits the cranial cavity. Aside from the release of the medulla oblongata and its layers, the foramen magnum carries the vertebral veins, the anterior and last spinal veins, the tectorial layers and alar ligaments.