Those are the kinds of changes we need to make in order to affect the system.

Lead can affect almost every organ and system in the body.

Weight has long been known to affect the female reproductive system.

It usually affects the central nervous system, including the brain.

The majority of these patients also had received other drugs known to affect the immune system.

She was making decisions that would affect entire systems full of beings.

They don't actually affect the system in any way outside of the sandbox.

Throughout his career, he has been looking at chemicals and the ways they affect the nervous system.

It's going to affect your nervous system after you've done all this work to balance yourself.

All of these affect the immune system in the individual frogs.