The ethmoid bone is a light spongy bone that forms much of the inner structure of the nose and attaches to the falx cerebri.

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The ethmoid bone is indeed a light spongy bone that forms much of the inner structure of the nose, including the nasal septum, nasal conchae, and some of the nasal cavity walls. However, it does not attach to the falx cerebri. The falx cerebri is a dense layer of dura mater that separates the two hemispheres of the brain, and does not have any direct connection to the ethmoid bone.

The Ethmoid Bone Is a Light Spongy Bone That Forms