Steps of nutrition ,ingestion ,digestion,absorption ,assimilation ,ejestion,digestion disorder,kwashiorkar ,marasmus,night blindness,scurvy,beri beri ,skin disease,cheliosis ,rickets,fat soluble vitamins water soluble vitamins ,sources of vitamins ,functions of vitamins ,vitamin A,D,,B,K,H,E, etc special for rbse 12th by monu jangir ,m.j.unique creation science classes.