Question

Match the steps of digestion with the organs in which they occur.
breaking down large food particles into smaller particles
mixing of food with digestive juices
absorption of digested food into the blood
removal of undigested food

Answer 1

- Breaking down large food particles into smaller particles → Mouth (teeth and tongue) — mechanical digestion by chewing (also aided by stomach churning).
- Mixing of food with digestive juices → Stomach — strong muscular churning mixes food with gastric juices (and some mixing continues in the small intestine).
- Absorption of digested food into the blood → Small intestine — villi and microvilli absorb nutrients into the bloodstream.
- Removal of undigested food → Large intestine/rectum and anus — water is absorbed and feces are expelled via the rectum and anus.