6.3

1. What are the different types of White Blood Cells? White Blood Cells are classified into the granular leukocytes and the agranular leukocytes because some have noticeable granules and some do not have noticeable granules. The granules help white bloodcells defend against disease. The granular leukocytes include neutrophils, eosinophils, and basophils. Neutrophilis account for 50% to 75% of all white blood cells, and they are the most abundant. Eosinophils have a bilobed nucleus, and their large abundant granules take up eosin and become a red color. Basophils have a U-shaped/lobed nucleus, and their granules take up the basic stain and become a dark blue color. The agranular leukocytes include the lymphocytes and the monocytes. The Lymphocytes account for 25%-35% of all white blood cells, and they are the second most abundant type of white blood cell. The monocytes are the largest of the white blood cells, and after they take up residence in the tissues, they spread out into even larger macrophages except in the skin where they become dendritic.

2. What is the structure and function of each type of white blood cell?- Each type of white blood cell tries to defend and protect against disease. Another function is the "vacuum cleaner" function of neutrophils is shared by macrophages and dendritic cells, which phagocytize phagocytize pathogens, old cells, and cellular debris.

3. Name and describe three disorders of white blood cells.- (SCID) Severe Combined Immunodeficiency Disease is when the stem cells of white blood cells lack an enzyme called adenosine deaminase. Leukemia is when a group of cancerous conditions that incolce uncontrolled white blood cell proliferation. Infectious Mononucleosis is one of the most common human viruses, and the symptoms of infectious mononucleleosis are fever, sore throat, and swollen lymph glands.