Winner of the April 2003 BioRad Image Competition
Section through a bone marrow cavity in the skull of a live mouse. The blood plasma is labelled with FITC-dextran (green). Note the rapid blood flow in the vessel center in the upper portion of the vessel. Rhodamine 6G (red) stains nuclei and mitochondria in the hematopoietic cells that adhere within the vessel (the round spheres insides the green detran-filled vessel) and the surrounding tissue. The cavity is enclosed in solid bone, which is not penetrated by rhodamine 6G and, hence, appears black.
