The table below shows the function of some of the body systems.
Body System | Function |
A | One part of this system is the longest so the substances take the longest time to pass through it to be broken down. |
B | One part of this system has hairs that prevent dust particles from entering the body. |
C | Every part of this system needs to work closely with the muscles to provide movement. |
Which body systems could A, B and C represent?