My friend's last name is Canale.

Her last name is Canal.

The neural canals protect the spinal cord.

The Haversian canals are microscopic channels in the bone that contain blood vessels and nerves.

The ear canals are responsible for transmitting sound waves to the eardrum.

I had to get multiple root canals.

The carpal canals in the wrist allow the passage of nerves and blood vessels.

The alar canals are responsible for draining tears from the eyes.

The alimentary canals of the animals are responsible for digestion.

The Schlemm's canals are responsible for draining aqueous humor from the eye.