The blood and lymph bed in Haversian bone.

The structure of the components of the Haversian canals of the osseous tissue of the adult human mandible was studied in celloidin sections stained with haematoxylin and eosin. Fine blood vessels - mostly profiles of postcapillary venules, precapillaries and occasional capillaries - were demonstrated in osteons with Haversian canals 60-80 microns in diameter. Neither lymph capillaries nor vessels were observed, even in wider Haversian canals with larger blood vessels. The intraosseal spaces with rich blood vessel plexuses likewise did not contain any lymphatics with a characteristic form.