Year 7 · Summer Second Half

Biology

3 lessons from 1 unit.

Unit B3 · lessons 6 to 8 of 8

Everything you have ever eaten was taken apart and rebuilt into you. This unit is about what your body needs, what happens to food after you swallow it, and why a gut full of bacteria is a good thing.

06Enzymes in digestionProcessOne enzyme molecule can cut a thousand others apart and still be there at the end. Heat it by fifteen degrees and it never works again. Neither of those is what people expect.Open this lesson
07Absorption and the small intestineModelA tube six metres long has half a square metre of inside surface. Yours has about thirty. Nothing was made longer.Open this lesson
08Bacteria in the gutSystemYou are carrying around thirty trillion bacteria in your large intestine. Your immune system knows they are there and leaves them alone. That is not a failure — it is the arrangement.Open this lesson

Back to all three sciences this half term The whole KS3 Biology course