Human Digestive System: The Food Path

Also called

digestive system · digestion · alimentary canal · food pipe · oesophagus · esophagus · stomach · small intestine · large intestine · liver · pancreas · gall bladder · bile · peristalsis · villi · absorption · saliva · path of food

Topics

• Food passes through one tube in order: mouth -> oesophagus -> stomach -> small intestine -> large intestine -> rectum…
• The liver, gall bladder, pancreas and salivary glands are helper (accessory) organs…
• Chewing and saliva begin digestion in the mouth
• Peristalsis: muscle squeezes behind the food and pushes it along
• The stomach churns food and mixes it with gastric juice
• Bile from the liver (stored in the gall bladder) breaks fat into droplets; bile is not a digestive enzyme
• Pancreatic juice contains enzymes and enters the duodenum
• Most digested food is absorbed through the villi of the small intestine into blood (and fats into lymph)
• The large intestine absorbs much of the remaining water; water is also absorbed in the small intestine
• Undigested waste leaves the body through the anus (egestion)

About this model

A GLB file of about 1891 KB, shown in Lably's 3D viewer and, on a phone, placed in your room with AR. Credit: Mouth, small intestine, large intestine (incl. rectum), liver and pancreas: HuBMAP Human Reference Atlas, CCF 3D Reference Object Library (Kristen Browne et al., NIH/NIAID; from the NLM Visible Human Project), CC BY 4.0, simplified. Stomach shape traced from the Tactiles digestive-system puzzle (CC BY-SA 4.0), so this model is shared under CC BY-SA 4.0. Oesophagus, gall bladder, ducts, anus, markers, close-up, stand and animation: made for Lably. | CC BY-SA 4.0

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