KS3 Biology — The Human Digestive System — Free Worksheet

🍽️ Find out what the human digestive system does and why food must be broken down with this free KS3 Biology worksheet — no preparation required, just download and use. The digestive system is a collection of organs that break food into nutrients small enough to be absorbed into the blood, allowing the body to extract the energy and materials it needs, and this taster resource introduces the basics for students aged 11–14.

📦 What's included:

3 questions, 13 marks:

Multiple choice — testing understanding of what digestion does (2 marks)

Fill-in-the-blank — completing sentences about the order food travels through the digestive organs, using a word box (5 marks)

Short answer — explaining why the body needs food and why it must be broken down before use (6 marks)

Full answer key with marking guidance included.

🎬 Watch the free video lesson: https://www.youtube.com/watch?v=7S5h2M87U3U

👩‍🏫 Google Classroom ready — copy the link straight into your assignment. Print as many copies as your class needs.

🔓 This is a taster only. The full 100-mark worksheet goes deeper into the adaptations of the oesophagus, stomach, and small intestine — including peristalsis and villi — the roles of the pancreas, liver, and bile in fat digestion, and the function of the large intestine in processing undigested food and fibre — available on its own, or as part of the Complete Lesson Pack with extension activities. Save £1 buying the pack (£3 + £3 = £6 separately, £5 together).

Price: Free