Haversian canals (also called central canals) run longitudinally through the bone and contain blood vessels and nerves which supply the bone.
Business casual: Generally means khaki pants, a plain polo shirt or a long-sleeved casual button-down oxford shirt, a V-neck sweater, sometimes a sports coat or blazer, and brown leather shoes. Loafers are a good choice, and you should wear socks.
For business casual, tie is optional. 1  White button-down shirts are the most formal and therefore the safest. 2  Choose shirts (and pants) in formal fabric: Cotton is king, and comes in many different flavors. 3  Choose shirts in formal patterns: Oxford, plaid, and poplin are a little less formal, but perfectly acceptable.-neck sweaters work best if wearing a a collar. 1  Turtlenecks can be worn in combination with a blazer for a sleek look and a little bit of novelty. 2  If you want to wear a suit coat and still look business casual, dress it down with khakis instead of suit pants.