Bone marrow: The soft blood-forming tissue that fills the cavities of bones and contains fat and immature and mature blood cells, including white blood cells, red blood cells, and platelets. Diseases or drugs that affect the bone marrow can affect the total counts of these cells.one marrow: The soft blood-forming tissue that fills the cavities of bones and contains fat and immature and mature blood cells, including white blood cells, red blood cells, and platelets. Diseases or drugs that affect the bone marrow can affect the total counts of these cells.
hooks (left) and loops (right). Velcro is a brandname and trademark owned by the Velcro Companies for hook-and-loop fasteners. Hook-and-loop fasteners have a hook side, which is a piece of fabric covered with tiny hooks, and a loop side, which is covered with even smaller and hairier loops.
Theorbo or Chitarrone. A theorbo, also sometimes called a chitarrone, is a lute with a long neck extension. A theorbo has two pegboxes, one at the top of the fingerboard and the other at the end of the extension. The extended neck is necessary because, before the invention of wire-wound strings, increasing the length was the only way to obtain a clear and sustained sound from low bass strings.