Secreted at various points along the digestive tract, enzymes break down large molecules of food into smaller molecules ... The first of three sections of the small intestine, the duodenum ...

Once there, the digested food molecules are carried around the body to where they are needed. Only small, soluble substances can pass across the wall of the small intestine. Large insoluble ...

The attractions water molecules have for each other keep them close together. They can move past each other, but their attractions keep them from moving far apart from each other. The blue food ...

They are just small molecules that should not be very complicated to produce on a large scale ... in order to protect our food supply as we strive towards a greener future.

Once there, the digested food molecules are carried around the body to where they are needed. Only small, soluble substances can pass across the wall of the small intestine. Large insoluble ...