- Skin is a kind of organ
- Skin is used for protecting the body from harmful substances
- So, skin is the organ that protects the body from harmful substances

- Skin is the organ that protects the body from harmful substances
- Harmful substances can cause disease in human
- Hence, skin is the organ that can protect the body from disease caused by harmful substances

Hence, skin is the organ that can protect the body from disease caused by harmful substances
Which organ directly works to protect the human body from disease?
- Harmful substances can cause disease in human 
- Skin is a kind of organ 
- Skin is used for protecting the body from harmful substances