For more on the meaning of colors for the color red. Orange is the color of social communication and optimism. From a negative color meaning it is also a sign of pessimism and superficiality. For more on the color orange. With the meaning of colors, in color psychology, yellow is the color of the mind and the intellect. It is optimistic and cheerful. However it can also suggest impatience, criticism and cowardice. For more on the color yellow.
The blood has several types of white blood cells including neutrophils, bands, eosinophils, basophils, monocytes and lymphocytes. Each fights infection in a different way. Neutrophils, for example, are one of the body's main defenses against bacteria. Neutrophils kill bacteria by ingesting them. Neutrophils can ingest five to 20 bacteria in their lifetime. Another type of white blood cell is called bands. Bands are immature neutrophils.
White blood cells, also called the leukocytes, help fight off infections in your body. Normally you will have between 3,500 and 5,000 white blood cells per microliter of blood. Less than this is considered low. A low white blood cell count means your body's ability to fight off infections is compromised. Types White blood cells come in five types: basophils, eosinophils, lymphocytes, monocytes and neutrophils.