HB-059 · Digestive · Assembly
Digestive system complete
Also called: digestive system, gut Systema digestorium
3D anatomy data Classes 2-5 · Classes 6-8 · Classes 9-10 · Classes 11-12 Beginner Draft - educator review
3D is not available on this device, so a picture of the model is shown instead.
Parts: mouth; pharynx; oesophagus; stomach; small intestine; large intestine; rectum; anus; liver; gallbladder; pancreas
Drag to rotate · right-drag or two fingers to pan · scroll or pinch to zoom · click a part for details · keys: arrows rotate, + and - zoom, R resets, Esc clears.
About
The digestive system breaks food into small molecules, absorbs them and removes what is left.
- 📍 Where it is
- A long tube from mouth to anus, with the liver, gallbladder and pancreas as helpers.
- 🧱 Structure
- Mouth, pharynx, oesophagus, stomach, small intestine, large intestine, rectum and anus, plus salivary glands, liver, gallbladder and pancreas.
- ⚙️ What it does
- Ingestion, mechanical and chemical digestion, absorption and elimination.
💡 Key facts
- The adult gut is roughly 8-9 metres long.
- Most absorption happens in the small intestine.
- The liver is the largest internal gland.
✗ Digestion starts in the stomach
✓ It starts in the mouth with chewing and saliva.
📒 Words to know
- digestion
- breaking down food
- absorption
- taking nutrients into the blood
- enzyme
- protein that speeds up reactions
🏫 Related lessons
- Food and nutrition Classes 1-5
- Food, nutrition and health Classes 6-8
- Life processes Classes 9-10
Generic GayaGnan topic lessons. Check your own board's syllabus for the exact chapter.
🔎 Sources and credits
Catalog description: Full digestive tract with accessory organs.
- OpenStax Anatomy and Physiology 2e, ch. 23 (digestive system) (accessed 2026-10-30)
- 3D models: BodyParts3D (DBCLS) and the Human Reference Atlas (HuBMAP), CC BY 4.0, with GayaGnan schematics. 3D model credits
For learning only. This site does not give medical advice, diagnosis or treatment, and it does not collect any health data.