The system of cells, organs, and chemicals of the body that responds to attacks from diseases and injuries is called the ________.

A) immune system
B) endocrine system
C) sympathetic nervous system
D) respiratory system

The immune system is responsible for protecting the body from diseases and injuries, and is composed of cells, organs, and chemicals that work together to fight off invaders. The endocrine system regulates hormones, the sympathetic nervous system controls the body's response to stress, and the respiratory system is responsible for breathing.