Your skeleton that holds the body up is the heaviest part of the human body.
Then after the skeleton the head is the second heaviest part of the human body.
A human head weighs from as much as 10 lbs to 11 lbs depending on the size of the human head.
The human skeleton weighs between 15 to 20 lbs depending on if you're a male or female and your over all weight.
The more you weigh the more your skeleton will usually weigh.
The human skeleton weighs about 15 percent of your actual body weight.
Some larger humans may have a skeleton that weighs as much as 25 lbs.
Of course if you're a baby or toddler or small child then your skeleton will weigh less.