Santa's Little Helper the show, but voice artist Frank Welker has also voiced him. Santa's Little Helper has become a popular character following his appearances on "The Simpsons". He ranked 27th in Animal Planet's 2003 television special "50 Greatest TV Animals" that was based on popularity, name recognition, and the longevity of the shows. He has also been featured in merchandise relating to "The Simpsons", such as video games, board games, and comics. Santa's Little Helper is a greyhound that appears on the animated television series "The Simpsons" and is the pet dog of the Simpson family. He can often be seen on
T helper 3 cell T helper 3 cell T helper 3 cells (T3) are white blood cells of the lymphocyte type. They are involved in regulating the body's immune response. The function of T helper cells generally is to mediate the immune response by secreting cytokines and interacting with B-cells to enhance or inhibit their activity. This is of particular importance in the gut as this is where the highest load of foreign material, food, is present. T3 cells are involved in mucosal immunity and protecting mucosal surfaces in the gut from non-pathogenic non-self antigens. They mediate this non-inflammatory environment by secreting TGF-β and