The gastrointestinal tract and several digestive organs such as the tongue, salivary glands, pancreas, liver, and gallbladder are all part of the human digestive system. Digestion is the act of breaking down food into smaller components so that the human body may absorb the nutrients in the meal. Some enzymes in the human digestive tract assist the body in breaking down food into smaller pieces. The unused or undigested portion of the meal is thrown out of the body after being utilised for nutrients. Students will learn all about it by practising important questions for class 7 Science on a regular basis.