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.
Average penis size. There are no average length figures for teenagers because people grow at different rates. For adults, the average penis size is about 14-16cm (5.5-6.3 inches) when erect. The average girth for an erect penis is 12-13cm (4.7-5.1 inches).A penis would only be considered unusually small if it was less than 3 inches (7.6cm) long when erect.The measurements are based on a review of 50 studies on penis size conducted since 1942, which between them have measured 11,531 penises.verage penis size. There are no average length figures for teenagers because people grow at different rates. For adults, the average penis size is about 14-16cm (5.5-6.3 inches) when erect. The average girth for an erect penis is 12-13cm (4.7-5.1 inches).