| | Conditions & Treatments | Digestive Health In which digestive system does the blood absorb nutrients? Your question appears to contain a misunderstanding. The process of nutrient absorption mainly occurs in the small intestine, not in the bloodstream. Digestive Health - Related Articles What does the small and large intestine do for body? Social Security and Crohn's Disease Uncontrollable Belching in Children High Fiber Foods to Eat When You Have Diverticulosis Pediatric Bowel Cleansing Home Remedies for Mild Hemorrhoids Digestive Disease