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.
A low white blood cell count, or leukopenia, is a decrease in disease-fighting cells (leukocytes) circulating in your blood. The threshold for a low white blood cell count varies from one medical practice to another.Some healthy people have white cell counts that are lower than what's considered normal.A count lower than 4,000 white blood cells per microliter of blood is generally considered a low white blood cell count. The threshold for a low white blood cell count in children varies with age and sex.1  Causes. low white blood cell count, or leukopenia, is a decrease in disease-fighting cells (leukocytes) circulating in your blood. The threshold for a low white blood cell count varies from one medical practice to another.