Digestive / VISUAL EXPLAINER
How Does Digested Food Cross the Intestinal Wall?
Absorbed nutrients take different routes after crossing intestinal cells. Simple sugars and amino acids enter blood headed toward the liver, while many long-chain fats are packaged into chylomicrons and enter lymph first.
READ THE IMAGE
What the illustration shows
Educational poster titled “How Does Digested Food Cross the Intestinal Wall?” A cutaway intestinal villus has a continuous pink enterocyte lining, red and blue blood vessels and a separate blind-ended green lacteal. A small locator shows folds of the small intestine. In the left inset, purple symbols for simple sugars and amino acids follow arrows through an enterocyte beside its nucleus, across interstitial tissue and into a blood capillary; the route reads “Blood → portal vein → liver.” In the right inset, small fatty-acid and monoglyceride components cross the brush border, are packaged into larger chylomicrons inside the cell, then pass into tissue and a lacteal; the route reads “Lymph → later joins blood.” A note says short-chain fatty acids can enter portal blood. The enlarged conceptual views are not to scale. AllHumanBody.com branding appears below.
How to interpret this poster
- Selected routes are shown; short-chain fatty acids can enter portal blood instead of following the chylomicron route.
- Vessels, particles and membranes are enlarged conceptual views, not measured ultrastructure.
- The linked section introduces the intestinal surface rather than teaching every intracellular packaging step.
- AI-assisted educational illustration; not physician certification, microscopy, a diagnosis or individualized medical advice.
- Fine annotations need enlargement; the full description provides an accessible text alternative.
AI-assisted educational illustration, adapted into web-sized images without changing its composition. This is general education, not an individual diagnosis or treatment recommendation.
EVIDENCE / CONTEXT
Sources and what they support
- Anatomy and Physiology 2e: 23.5 The Small and Large Intestines ↗
Villi, epithelial covering, microvilli and the vascular core.
- Anatomy and Physiology 2e: 23.7 Chemical Digestion and Absorption: A Closer Look ↗
Sugar/amino-acid blood routes, intracellular chylomicron formation, lacteals and short-chain exceptions.
- Your Digestive System & How It Works ↗
Intestinal nutrient uptake and liver-bound blood delivery, with lipid-route detail supplied by the absorption reference.