Note on havesion

Dear Student

I guess there is some spelling mistake.

It should be Haversian canal.
It is a series of microscopic tubes in the outermost region of bone called cortical bone that allow blood vessels and nerves to travel through them.
Each haversian canal generally contains one or two capillaries and nerve fibres.

The Haversian canal together with lamellae, lacunae and canaliculi forms a Haversian system.

Regards