Progressive EraThe Progressive Era (1896–1917) was a period of widespread social activism and political reform across the United States focused on defeating corruption, monopoly, waste, and inefficiency. The main themes ended during American involvement in World War I (1917–1918) while the waste and efficiency elements continued into the 1920s. Progressives sought to address the problems caused by rapid industrialization, urbanization, immigration, and political corruption; and by the enormous concentration of industrial ownership in monopolies.
Blood plasmaBlood plasma is a light amber-colored liquid component of blood in which blood cells are absent, but which contains proteins and other constituents of whole blood in suspension. It makes up about 55% of the body's total blood volume. It is the intravascular part of extracellular fluid (all body fluid outside cells). It is mostly water (up to 95% by volume), and contains important dissolved proteins (6–8%; e.g., serum albumins, globulins, and fibrinogen), glucose, clotting factors, electrolytes (Na+, Ca2+, Mg2+, , Cl−, etc.
World War IWorld War I or the First World War, often abbreviated as WWI or WW1, known contemporaneously as the Great War, was a major global conflict lasting from 1914 to 1918. It was fought between two coalitions, the Allies and the Central Powers. Fighting took place throughout Europe, the Middle East, Africa, the Pacific, and parts of Asia. The first decade of the 20th century saw increasing diplomatic tension between the European great powers.
Red blood cellRed blood cells (RBCs), also referred to as red cells, red blood corpuscles (in humans or other animals not having nucleus in red blood cells), haematids, erythroid cells or erythrocytes (from Greek erythros 'red' and kytos 'hollow vessel', with -cyte translated as 'cell' in modern usage), are the most common type of blood cell and the vertebrate's principal means of delivering oxygen (O2) to the body tissues—via blood flow through the circulatory system.
Washington, D.C.Washington, D.C., formally the District of Columbia and commonly called Washington or D.C., is the capital city of the United States. The city is located on the east bank of the Potomac River, which forms its southwestern border with Virginia, and borders Maryland to its north and east. The city was named for George Washington, a Founding Father, victorious commanding general of the Continental Army in the American Revolutionary War, and the first president of the United States who is sometimes referred to as "Father of his country"; the district is named for Columbia, the female personification of the nation.
