Understanding Blood Cells and Immunity
Blood is composed of various types of cells that perform essential functions in the body. Among these, some play a crucial role in the immune system.
Types of Blood Cells
- Red Blood Cells (Erythrocytes):
- These cells are primarily responsible for transporting oxygen from the lungs to the body tissues and returning carbon dioxide to the lungs for exhalation.
- They do not play a direct role in immunity.
- White Blood Cells (Leucocytes):
- These are the key players in the immune system.
- They help defend the body against infections and foreign invaders such as bacteria and viruses.
- There are various types of leukocytes, including:
- Neutrophils: Attack bacteria and fungi.
- Lymphocytes: Produce antibodies and remember past infections.
- Monocytes: Differentiate into macrophages and clear dead cells and pathogens.
- Eosinophils: Fight parasitic infections and are involved in allergic reactions.
- Basophils: Release histamine during allergic responses.
- Platelets (Thrombocytes):
- These are essential for blood clotting and wound healing.
- They do not contribute to the immune response.
Conclusion
In summary, the correct answer regarding blood cells that show immunity is Leucocytes (White Blood Cells). While erythrocytes (red blood cells) and thrombocytes (platelets) have vital functions, they do not directly contribute to the immune response. Understanding the role of leucocytes is fundamental to grasping how the immune system protects the body from diseases.