In your body, you have only two types of bone tissue: cortical and cancellous bone. In this lesson, we will learn about the structure and function of cancellous bone, which plays a crucial role in producing blood cells and stem cells and is the primary tissue affected by osteoporosis.
balaclava (plural balaclavas) 1  A warm cap shielding the neck and head, often made out of wool. ( 2 chiefly Canada) A ski mask with holes for the eyes and, sometimes, the nose and mouth, which may be rolled up and worn like a toque or pulled over the face for greater protection.
A cravat worn for everyday wear is a form of neckwear that is worn with an open collar shirt, with the fabric tucked in behind the shirt to cover the lower neck and chest area. It is largely a men's accessory, although it is becoming increasingly common in womenswear too.he ultimate guide to the cravat, introducing them to beginners and delving into the mysteries of the strange names, fabric choices and even what shirt to wear. This is a genuine read-before-you-buy guide to all things cravat-like, so you can make an informed choice as to your preferred cravat style.