Lesson 9 ·Class 9 · Digestive System · Match Lab
The Large Intestine and Assimilation
What happens to what is left.
Match each term to what it means.
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Free play — tap an item on the left, then its partner on the right; each link tells you why. Switch to when you're ready to test yourself.
Egestion and excretion are different: egestion removes food that was never absorbed, excretion removes waste made by the cells.
What this lesson covers
Challenges to clear
- Match every term.
- Connect assimilation to its meaning — it is not the same as absorption.
The task
Match each term to what it means.
What this lesson covers
- Absorption — Digested food passing from the gut into the blood or lymph (Happens mainly through the villi of the small intestine.)
- Assimilation — Absorbed food being built into the body's own tissue or used for energy (The step after absorption — the food finally becomes part of you.)
- Egestion — Removal of undigested waste as faeces (Not excretion — this material was never inside the body's cells.)
- Caecum and appendix — A pouch at the start of the large intestine, vestigial in humans (Large in herbivores, where it digests cellulose; reduced in us.)
- Colon — Absorbs water and minerals from the remaining material (This is what turns liquid residue into solid faeces.)
- Bacteria of the colon — Synthesise vitamin K and some B vitamins for us (A genuine symbiosis — we house them, they supply vitamins.)
- Rectum — Stores faeces until they are passed out through the anus (The final section of the canal.)
Hint
Egestion and excretion are different: egestion removes food that was never absorbed, excretion removes waste made by the cells.