It seems that you have answered your own question, if what you've stated is the correct answer
an average adult human heart weighs approximatly female: 9 ounces male: 10.5 ounces
An average digital camera weighes approximatley 12 ounces, however, a professional camera (not including a stand) weighs about 18 ounces.
On average, one grape weighs about 0.2 ounces.
On average, a medium apple weighs about 6 to 8 ounces.
On average, a prune weighs about 10 grams or 0.35 ounces.
On average, a walnut weighs about 0.2 ounces or 5-7 grams.
An average leek is about 180 grams. (6.34931 ounces)
151 Grams of grapes are in one cup.
An NFL football weighs 14-15 ounces
On average, a piece of gum weighs about 0.1 ounces.
An 'average' egg weighs a little over 2 ounces. Therefore 16 ounces would require 7.5 eggs
A horses brain weighs 22 ounces or 1 pound 6 ounces. A horses heart weighs on average 8.5 pounds (A Thoroughbreds heart weighs an average of 10 pounds.) So the heart of a horse will outweigh the weight of it's brain.