7. पाचन तन्त्रा (Digestive System)

पाचन तन्त्रा (Digestive System) Why the digestive system : The food that we eat cannot be utilized as such in the body. It must be changed into a soluble absorbable form to get absorbed by the blood for distribution in the body. Certain foods, like cane-sugar are already soluble in water, but they require a Read More