Answer:
How Does the Immune System Work? When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and get rid of them. B lymphocytes are triggered to make antibodies (also called immunoglobulins). These proteins lock onto specific antigens.
It resting heart rate will decrease after being conditioned by physical exercise
The time it takes to move in responce to a stimulus is called the reaction time
Five cardinal signs of an infection should be swelling, high temperature,pain, redness and stuff coming out your body such as pus. :).
