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Diet and Nutrients are not covered in the Cambridge book until grade 6 so here is a helpful website with a small quiz at the end

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BBC Bitesize - KS3 Biology - Diet - Revision 1

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Learn about the uses of nutrients and what makes a balanced diet with BBC Bitesize KS3 Science.

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You have to know examples and the function of each.

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Iodine is abrown chemical that turns blue/black when starch is present.

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Biuret Solution is a blue chemical that turns purple when protein is present.

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Diet and Nutrients are not covered in the Cambridge book until grade 6 so here is a helpful website with a small quiz at the end

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BBC Bitesize - KS3 Biology - Diet - Revision 1

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Learn about the uses of nutrients and what makes a balanced diet with BBC Bitesize KS3 Science.

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The Digestive System is not covered in the Cambridge book until grade 6 so here is a helpful website with a small quiz at the end

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The food we eat has to be broken down into other substances that our bodies can use. This is called digestion. Without digestion, we could not absorb food into our bodies and use it.

Digestion happens in the digestive system, which begins at the mouth and ends at the anus.

After we swallow, our food passes through these organs in turn:

oesophagus or gullet

stomach

small intestine

large intestine

Different things happen to food as it passes through the digestive system:

food is digested in the mouth, stomach and small intestine

digested food is absorbed into the bloodstream in the small intestine

excess water is absorbed back into the body in the large intestine

any undigested food passes out of the anus as faeces when we go to the toilet

The liver and the pancreas play an important part in digestion. The liver produces bile, which helps the digestion of lipids (fats and oil). The pancreas produces biological catalysts called digestive enzymes which speed up the digestive reactions.

You need to have JavaScript enabled to view this video clip.

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The food we eat has to be broken down into other substances that our bodies can use. This is called digestion. Without digestion, we could not absorb food into our bodies and use it. Digestion happens in the digestive system, which begins at the mouth and ends at the anus.

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The Digestive System is not covered in the Cambridge book until grade 6 so here is a helpful website with a small quiz at the end

# data[].attributes.attachment_link.readable_text
The food we eat has to be broken down into other substances that our bodies can use. This is called digestion. Without digestion, we could not absorb food into our bodies and use it.

Digestion happens in the digestive system, which begins at the mouth and ends at the anus.

After we swallow, our food passes through these organs in turn:

oesophagus or gullet

stomach

small intestine

large intestine

Different things happen to food as it passes through the digestive system:

food is digested in the mouth, stomach and small intestine

digested food is absorbed into the bloodstream in the small intestine

excess water is absorbed back into the body in the large intestine

any undigested food passes out of the anus as faeces when we go to the toilet

The liver and the pancreas play an important part in digestion. The liver produces bile, which helps the digestion of lipids (fats and oil). The pancreas produces biological catalysts called digestive enzymes which speed up the digestive reactions.

You need to have JavaScript enabled to view this video clip.

# data[].attributes.attachment_link.description
The food we eat has to be broken down into other substances that our bodies can use. This is called digestion. Without digestion, we could not absorb food into our bodies and use it. Digestion happens in the digestive system, which begins at the mouth and ends at the anus.

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Enzymes are difficult, here is a video to help.

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More Help.

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The Alimentary Canal is another term for the digestive system.

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Enzymes are biological catalysts- they speed up food breaking down.