Final answer:
Water-soluble vitamins are directly absorbed into the bloodstream, while fat-soluble vitamins are absorbed through the lymphatic system.
Step-by-step explanation:
Water-soluble vitamins can be directly absorbed into the bloodstream from the intestine, while fat-soluble vitamins are absorbed in the same manner as lipids. Fat-soluble vitamins diffuse through the plasma membrane and enter the lacteals of the villi to be transported by lymphatic vessels. On the other hand, water-soluble vitamins, like most B vitamins and vitamin C, are absorbed by simple diffusion, except for vitamin B12 which requires intrinsic factor for uptake.