bone marrow <span>contains hematopoietic stem cells, which give rise to the three classes of blood cells that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)</span>
AIDS because it is incurable, however since there are treatments available, AIDS can still go dormant. it is also the least bit noticeable to the naked eye.
hope this helped hun.
Two sources of light in a kitchen would be Ceiling or wall-mounted fixtures.
Water can help to fight colds, hydrate our body when we feel dehydrated etc
