Human body systems
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​Exercise  4
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Active or passive voice (Human body parts)

Active or passive voice (Human body parts)

Put "A" for active or "P" for passive voice.
1. Waste is filtered by the excretory system.
2. The liver detoxifies the blood.
3. A nerve carries signals from the body.
4. The food is chewed by the teeth.
5. The respiratory system controls breathing.