These are the main cells that make up lymphoid tissue, a major part of the immune system. Lymphoid tissue is found in lymph nodes, the thymus, the spleen, the tonsils and adenoids, and is scattered throughout the digestive and respiratory systems and the bone marrow.Lymphocytes develop from cells called lymphoblasts to become mature, infection-fighting cells.hese are the main cells that make up lymphoid tissue, a major part of the immune system. Lymphoid tissue is found in lymph nodes, the thymus, the spleen, the tonsils and adenoids, and is scattered throughout the digestive and respiratory systems and the bone marrow.
Comcast Corporation (formerly registered as Comcast Holdings) is an American global telecommunications conglomerate that is the largest broadcasting and cable television company in the world by revenue.
Comcast Cable originated in 1963 as American Cable Systems. ACS was founded by Ralph Roberts, Daniel Aaron and Julian Brodsky. The company incorporated in Pennsylvania in 1969 as the Comcast Corporation. In 1996, Comcast launched Comcast Online, a broadband internet service. Comcast currently provides broadband service to over 18 million customers. In 2002, Comcast paid $25 million to the University of Maryland to name their basketball arena the Comcast Center. In 2009, Comcast bought majority ownership in NBCUniversal. Comcast also owns interests in E! Entertainment, the Style Network, G4 and the Golf Channel.