Physical barriers
immune system
body temp
True, emotions could be bad like feeling sad or they can be good like being happy.
Answer:
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture and circulates blood throughout the body. ... Together with the skeletal system, it forms the musculoskeletal system, which is responsible for movement of the human body.
Explanation:
took the quiz
Chronic bronchitis and emphysema. :)
