Answer: C - The lymphatic system contains for organs: the spleen, tonsils, Peyer's patches, and thymus gland. The spleen is a part of the hemic system, which creates and stores red blood cells. The tonsils are an initial line of defense against bacteria entering through the throat. Peyer's patches are located in the small intestine and help prevent bacteria from infecting the intestines. The thymus gland produces T-cells, which are used in the immune system and also aid in auto-immunity or keeping the body from attacking itself.