Nearby USPS - Postal Service Locations. 1  225 S Van Rensselaer St, Rensselaer (0.1 mi) 2  120 W Harrison St, Rensselaer (0.1 mi) 3  200 W Washington St, Rensselaer (0.2 mi)
Production of red blood cells is controlled by erythropoietin, a hormone produced primarily by the kidneys. Red blood cells start as immature cells in the bone marrow and after approximately seven days of maturation are released into the bloodstream.lood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets. Blood has many different functions, including: 1  transporting oxygen and nutrients to the lungs and tissues.
Eventually, the blood enters the superior and inferior vena cava (the largest veins in the body) again and one circulatory route has been completed. Blood. Blood is made up of cells and plasma. The major types of cells are red blood cells, white blood cells, and platelets. Red Blood Cells. Also called erythrocytes, red blood cells (rbc) are the most numerous cells in the blood.