Red blood cells contain hemoglobin, a complex protein that carries oxygen throughout the body, giving blood its red color. According to the AABB, there are about one billion red cells in every two to three drops of blood. Red cells are manufactured in bone marrow and live for approximately 120 days in the circulatory system. Broken down cells are removed by the spleen. White blood cells protect the body from outside threats such as bacteria and viruses.
Lymphocytes support the immune system.
The presence of an excessive amount of white cells during blood tests is a good indicator of infection or disease, Cho says. The first step to fitness is choosing a good walking shoe. Helping an overweight child lose pounds is easier when it's a family affair. The first step to fitness is choosing a good walking shoe. Home Island Scene Online is not intended to replace the advice of health care professionals.