There are approximately 11,000 active licensed Customs brokers in the United States. Corporations, partnerships and associations must have a broker license to transact Customs business. Each of these businesses must have at least one individually licensed officer, partner or associate to qualify the company's license.
Bone marrow is the flexible tissue in the interior of bones. In humans, red blood cells are produced by cores of bone marrow in the heads of long bones in a process known as hematopoiesis.On average, bone marrow constitutes 4% of the total body mass of humans; in an adult weighing 65 kilograms (143 lb), bone marrow typically accounts for approximately 2.6 kilograms (5.7 lb).he two types of bone marrow are red marrow (Latin: medulla ossium rubra), which consists mainly of hematopoietic tissue, and yellow marrow (Latin: medulla ossium flava), which is mainly made up of fat cells.
Red blood cells, white blood cells and plasma are all formed inside of bones in the red bone marrow. Stem cells within the bone marrow constantly produce blood cells and work harder when the body is ill or bleeding to make up for blood cells lost.lowly, as the body ages, this marrow is replaced by inactive marrow that is known as yellow bone marrow. Red bone marrow is responsible for producing and destroying blood cells. About a third of the marrow's production consists of red blood cells and the rest is white blood cells and platelets.