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Primary 4 Science: Human Body Systems Practice
Real Primary 4 Science questions on Human Body Systems, pulled directly from the Olibits question bank — the same questions a child would actually see, not separately written for this page.
Curriculum alignment
Science Teaching & Learning Syllabus, Primary Three to Six (MOE, 2023 syllabus)
Science is not a taught subject at P1/P2 under MOE's own syllabus — our P1/P2 Science content is offered as enrichment beyond the official syllabus, not as a claim of syllabus coverage at those grades.
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Real Human Body Systems practice questions
Which part of the digestive system is where digestion first begins?
The stomach
The large intestine
The mouth ✓
The small intestine
In the mouth, teeth chew food into smaller pieces and saliva starts to break it down.
After food is swallowed, which tube carries it down to the stomach?
The windpipe
The large intestine
The food pipe (oesophagus) ✓
The small intestine
The food pipe connects the mouth to the stomach and pushes swallowed food downwards.
What does the stomach mainly do to food?
Absorbs all the nutrients
Mixes it with digestive juices to break it down further ✓
Filters out water only
Turns it directly into waste
The stomach churns food and mixes it with digestive juices to break it down into a soft mixture.
After leaving the stomach, where does partly digested food go next?
The small intestine ✓
The mouth
The large intestine
The lungs
Food moves from the stomach into the small intestine, where most nutrients are absorbed.