The question "Which organ is extra in the human body?" is a bit tricky, as it implies that a typical human body has an organ that is unnecessary or redundant. This isn't quite true. While some organs might be less vital than others, most are crucial for survival.
However, there are instances where a person might have an extra organ, which is called a supernumerary body part. This is a congenital disorder where an additional part of the body develops, often due to a deviation in the body's normal developmental plan.
One example is the accessory spleen, which occurs in more than one in ten people. These extra spleens often go unnoticed as they usually function normally alongside the primary spleen.
Another common supernumerary structure is the cervical rib, an extra rib found at the base of the neck above the normal rib cage. While most people don't experience any problems, this extra rib can sometimes cause nerve compression or blood vessel issues.
Therefore, the answer to the question depends on how you interpret "extra". If you're asking about a common supernumerary structure, then the accessory spleen is a good example. However, if you're asking about an organ that's unnecessary for typical survival, then the question is a bit more complex.
