The best way to classify the group of tissues that absorb nutrients from food is as part of the gastrointestinal (GI) tract, which includes the mouth, esophagus, stomach, small intestine, and large intestine. The tissues in the GI tract work together to break down food into its component parts and absorb nutrients into the bloodstream. Other organs like the liver, pancreas, and gallbladder also play important roles in digestion and nutrient absorption. Overall, the digestive system is a complex and highly coordinated system that is essential for maintaining good health.