Medical Definition of Red blood cells. Red blood cells: The blood cells that carry oxygen. Red cells contain hemoglobin and it is the hemoglobin which permits them to transport oxygen (and carbon dioxide). Hemoglobin, aside from being a transport molecule, is a pigment. It gives the cells their red color (and their name).
Alexander Milne Calder (August 23, 1846 â June 4, 1923) was a Scottish American sculptor best known for the architectural sculpture of Philadelphia City Hall. Both his son, Alexander Stirling Calder, and grandson, Alexander Sandy Calder, became significant sculptors in the 20th century.
Juan Manuel Santos, in full Juan Manuel Santos CalderÃ³n (born August 10, 1951, BogotÃ¡, Colombia), Colombian politician who cofounded (2005) the Social Party of National Unity (Partido Social de Unidad Nacional, or Partido de la U), later served as president of Colombia (2010â ), and was awarded the Nobel Peace Prize in 2016 for his efforts to end ...