Which bodily system is responsible for fighting disease?

A) circulatory system
B) immune system
C) respiratory system
D) nervous system

The immune system is responsible for fighting disease by producing specialized cells and proteins that target and destroy pathogens (such as viruses and bacteria) and other foreign substances in the body. The circulatory system helps deliver these immune cells and proteins throughout the body, but it is not responsible for fighting diseases directly. The respiratory system primarily helps in the exchange of oxygen and carbon dioxide, while the nervous system is responsible for transmitting signals throughout the body.