These Haversian canals are supplied with tiny blood-vessels, while the lacunae contain bone cells.
"A Practical Physiology" by Albert F. Blaisdell
A piece of bone undergoing rarefactive ostitis is redder than normal, and the openings of the Haversian canals are distinctly increased in size.
"Diseases of the Horse's Foot" by Harry Caulton Reeks
HAVERSIAN CANALS, canals in the bones to convey the vessels that nourish them.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood