The answer is the Lymphatic system
The lymphatic system plays an integral role in the immune functions of the body. It is the first line of defense against disease. The system itself is an extensive drainage network that helps keep bodily fluid levels in balance and defends the body against infections.
Answer:
Your answer would be D :)
Explanation:
Well generally it will be a positive impact (Of course this generally depends on what the "Physical activity" is, it is generally good, reason being while exercising causes the brain to release endorphin's, as well as helping relax muscles and relieve physical tension, which can greatly help with stress.
