The second guna is rajas, that is the stage when man starts the active process of self-development, transcends dumb primitiveness, grows as a warrior, and then as a leader, organizer of other people. The third guna is sattva, that is purity, harmony, bliss, happiness.
Villi also help the food to move along the digestive tract. Food takes three to six hours to move through the small intestine. The small intestine has three parts, the duodenum, jejunum and ileum.
Full Answer. The HyperPhysics resource states that the microvilli play an especially crucial role in the human small intestine. Microvilli are attached to the collections of cells known as villi that extend from the tissue of the small intestine. They work to dramatically increase the amount of surface area available for the digestive process.