Types of Leukocytes

1. Neutrophils: These are the most abundant type of white blood cells and are essential for fighting bacterial infections.
2. Lymphocytes: They are responsible for specific immune responses and include T cells, B cells, and natural killer cells.
3. Monocytes: These cells are crucial for engulfing and digesting pathogens and dead cells.
4. Eosinophils: They are involved in combating parasitic infections and regulating allergic responses.
5. Basophils: These cells release chemicals like histamine during allergic reactions and parasitic infections.

Functions of Leukocytes

• Phagocytosis: Engulfing and destroying pathogens and foreign particles.
• Production of antibodies: Lymphocytes produce antibodies to neutralize harmful substances.
• Release of inflammatory mediators: Basophils and mast cells release chemicals that promote inflammation in response to infections.
• Immune surveillance: Detecting and destroying abnormal or cancerous cells in the body.

Study Guide for Leukocytes

1. Understand the different types of leukocytes and their respective functions.
2. Learn about the processes involved in leukocyte activation and recruitment to sites of infection.
3. Explore the role of leukocytes in the immune response to pathogens, including bacteria, viruses, and parasites.
4. Understand the concepts of phagocytosis, antigen presentation, and cytokine production by leukocytes.
5. Consider the clinical significance of abnormal leukocyte counts and conditions such as leukopenia and leukocytosis.