Carbohydrates are technically hydrates of carbon; structurally it is more accurate to view them as polyhydroxy aldehydes and ketones. The term is most common in biochemistry, where it is a synonym of saccharide, a group that includes sugars, starch, and cellulose.
A human head will typically range from 54 to 57 inches in circumference. The length is on average 21 to 22 inches and the width is 17 to 18 inches.nswer by dwammer (710). The average size of the human head is 22 inches long and about 18 inches wide. The average circumferance is 55 inches around the head. add a comment.
1. The average erect penis is a little more than 5 inches long and 1.5 inches in diameter. Specifically, a 2013 study published in the Journal of Sexual Medicine found the average American manâs penis is 5.6 inches (14.2 centimeters) long when erect and 4.8 inches in circumference.Only 15 percent of men are over 7 inches, and only three percent are over 8 inches.pecifically, a 2013 study published in the Journal of Sexual Medicine found the average American manâs penis is 5.6 inches (14.2 centimeters) long when erect and 4.8 inches in circumference.