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.
Peel and Stick Closures for a Permanent Bond. Sticky Back for Fabrics is an easy to apply peel-and-stick hook and loop fastener that provides a durable adhesive bond to fabrics with no sewing, gluing or ironing required. The durable VELCROÂ® Brand closures withstand numerous washings, are appropriate for use on cotton, polyester, poly blends, and nylon, and can be reused hundreds of times.