leaf is an example of organ.
The digestive system.
the heart is an organ while it is a part of the circulatory system
A specific organ is any organ that you name directly, such as the Brain or a Kidney.
an organ
Stomach.
A telephone.
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an organ
It is an organ.
Human skin is an example of an organ because it provides protection for the rest of our body.
The heart is an example of an organ in the human body. The liver is another example.