Want to give out points here

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

What are some natural processes that represent physical and chemical changes?