Human digestive system 4.2.2.1 pt1

chemicals present in carbohydrate

carbon, hydrogen, oxygen

chemical elements present in proteins

carbon, hydrogen, oxygen, nitrogen

chemical elements present in lipids

carbon, hydrogen, oxygen

Structure of Carbohydrates

large molecule made from simple sugars

Monosaccharide

Simplest form of sugar, can not be broken down further. Basic units from which all carbohydrates are built

disaccharides

Composed of two monosaccharides joined together

monosaccharides examples

glucose, galactose, fructose

disaccharides examples

sucrose, maltose, lactose

Polysaccharides

large molecule composed of many smaller monosaccharides

polysaccharide examples

starch, glycogen, cellulose

Protein structure

large molecule made from amino acids

lipids structure

large molecule made from fatty acids and glycerol