transfer into another Scissors Describe the functions of the Watch the video of digestion of bowl via a sieve (small Microscopes organs in the system an egg sandwich (see intestine). Slides of small resources). Explain how the small intestine. what is left in the sieve intestine is adapted for its Describe the pathway of an function. egg sandwich from mouth to must be soaked up anus. Tell it as a story. with a sponge (large intestine) then emptied into a small sandwich bag (rectum). cut a hole in corner of bag for anus and show egestion. View sections of the small intestine under a microscope Make a model to show how the villi increase the surface area of the small intestine. 4.2.2.1 Properties of enzymes Define the terms 1 Recap KS3 work on enzymes. Interpret observations of Demo: Manganese ‘catalyst’ and the action of a catalyst dioxide, liver, boiled ‘enzyme’. Enzymes are Demo: the action of an and of catalase from liver, celery, apple or biological catalysts. Describe the properties of inorganic catalyst and celery, potato, fresh liver potato, hydrogen enzymes. catalase, using living and dead peroxide, test tubes tissues, on the breakdown of
Describe the functions of the organs in the system Explain how the small intestine is adapted for its function. Watch the video of digestion of an egg sandwich (see resources). Describe the pathway of an egg sandwich from mouth to anus. Tell it as a story. transfer into another bowl via a sieve (small intestine). what is left in the sieve must be soaked up with a sponge (large intestine) then emptied into a small sandwich bag (rectum). cut a hole in corner of bag for anus and show egestion. View sections of the small intestine under a microscope Make a model to show how the villi increase the surface area of the small intestine. Scissors Microscopes Slides of small intestine. 4.2.2.1 Properties of enzymes Enzymes are biological catalysts. Define the terms ‘catalyst’ and ‘enzyme’. Describe the properties of enzymes. 1 Recap KS3 work on enzymes. Demo: the action of an inorganic catalyst and catalase, using living and dead tissues, on the breakdown of Interpret observations of the action of a catalyst and of catalase from celery, potato, fresh liver Demo: Manganese dioxide, liver, boiled liver, celery, apple or potato, hydrogen peroxide, test tubes