The immune system is a complex defense system that protects the body from pathogens such as bacteria, viruses, fungi, and parasites. It consists of specialized cells such as white blood cells and organs such as the spleen and lymph nodes. The immune system works by identifying and destroying foreign invaders to prevent disease. When a pathogen enters the body, the immune system produces antibodies that bind to and destroy it. The immune system also has immune memory, allowing it to recognize previously encountered pathogens and respond faster and more effectively. A weak immune system increases disease risk, while a strong immune system helps maintain overall health. Immunity can be strengthened through proper nutrition, exercise, adequate sleep, and stress management.
  الهدف 3 : الصحة الجيدة والرفاه