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.
Early Life. Alexander Graham Bell was born on March 3, 1847, in Edinburgh, Scotland. The second son of Alexander Melville Bell and Eliza Grace Symonds Bell, he was named for his paternal grandfather. The middle name âGrahamâ was added when he was 10 years old.lexander Graham Bell was born on March 3, 1847, in Edinburgh, Scotland. The second son of Alexander Melville Bell and Eliza Grace Symonds Bell, he was named for his paternal grandfather.