What is inflammatory bowel disease? Inflammatory bowel disease (IBD) is a condition where the small or large intestine becomes inflamed. Sign and symptoms. The main symptoms of IBD are diarrhea, bloating, stomach pain, cramping, and weight loss.
InfoPlease explains that human skin weighs between  8 to 10 pounds in normal adults, with around 22 square feet of area. The skin is the largest organ in the body in terms of weight and area. One of the smallest organs in the body, the pineal gland, weighs around 0.2 gram, or 0.007 ounce. The pineal gland is in the center of the brain, according to Kids Discover. The parathyroid is between 0.004 and 0.006 ounce, or 0.12 to 0.18 gram.
I'd be a little wary of the 11 pounds estimate. For example Human head article on Wikipedia puts that figure down to 5-11 lbs. But this is quite irrelevant since in many cultures you see people (especially women) carrying great loads atop their heads either for cultural reasons.