History of the USS San Francisco. The USS San Francisco is a Los Angeles Class nuclear submarine and had a billion dollar price tag when it was built in the 1970s. Los Angeles class submarines were built from 1976-1996, with 62 completed and 39 still in service today, one of which is the USS San Francisco. These submarines have an estimated maximum speed of 30-33 knots, although the exact speed is classified. The USS San Francisco has an operational depth of 650 feet.
Full Definition of WHITE BLOOD CELL. : any of the blood cells that are colorless, lack hemoglobin, contain a nucleus, and include the lymphocytes, monocytes, neutrophils, eosinophils, and basophils âcalled also leukocyte, white blood corpuscle, white cell.See white blood cell defined for English-language learners.ull Definition of WHITE BLOOD CELL. : any of the blood cells that are colorless, lack hemoglobin, contain a nucleus, and include the lymphocytes, monocytes, neutrophils, eosinophils, and basophils âcalled also leukocyte, white blood corpuscle, white cell. See white blood cell defined for English-language learners.
White blood cells. Blood cells that help fight infection and other diseases. An important part of the body's immune system, white blood cells (WBCs) are made in the bone marrow (the soft, sponge-like tissue in the center of most bones). White blood cells are classified according to their structure and function. Two of the most common types are lymphocytes and neutrophils. A low WBC count is called leukopenia. A high WBC count is called leukocytosis. White blood cells are also called leukocytes.