An Introduction to the Immune System
The immune system is the body's defense mechanism against infections, diseases, and harmful substances. It is composed of various cells, tissues, and organs that work together to identify and combat pathogens like bacteria, viruses, and fungi. The key players in the immune system include white blood cells, antibodies, the lymphatic system, and the spleen. By understanding how these components function, we can better appreciate the importance of maintaining a healthy immune system through proper nutrition, exercise, and hygiene.