Answer:
do not know the answer and have no explanation
Answer:
The immune system recognizes damaged cells, irritants, and pathogens, and it begins the healing process. When something harmful or irritating affects a part of our body, there is a biological response to try to remove it.
...
These can include:
fatigue.
mouth sores.
chest pain.
abdominal pain.
fever.
rash.
joint pain.
Answer:
B. system
Explanation:
An example of a system would be the circulatory system helps circulate blood carrying nutrients to organs and waste material away from organs. It includes the organs - heart, blood vessels and lungs.
