- The longest bone in the human body is the femur.
- The largest artery is the aorta[17] and the largest vein is the inferior vena cava.
- The largest internal organ is the liver.[19] It is also the heaviest organ, with an average of 1.6 kilograms (3.5 pounds).
- The largest external organ, which is also the largest organ in general, is the skin.
- The longest muscle is the sartorius muscle in the thigh.
- The longest single nerve is the sciatic nerve in the thigh, counting its branches and axons.
According to wikipedia these are the largest,, or longest organs in our body. I can’t proved it, but I’m a believer.