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I'm sorry. Come on. One, two, three.

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They do things.

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Good. We're going to start.

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Okay. Our sense of smell triggers the production of saliva in our mouths.

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This helps the tea to crush the leaves as we chew it

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and is the first step in the process of digestion.

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The tongue shapes the food into a ball called a bolus.

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When we swallow, the bolus passes into the esophagus,

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which is a stretchy tube that links the back of the throat with the stomach.

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There is a special flat part at the back of the tongue called the epiglottis,

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which prevents food from going down the windpipe into the lungs.

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The muscles in the wall of the esophagus slowly squeeze the food down to the stomach.

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The role of the stomach is to break down food.

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The stomach does this by using its strong muscular walls and excreting gastric juices,

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which mix with the bolus and kill dangerous bacteria.

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Once the food is dissolved into a liquid, it passes into the small intestine.

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Here, it mixes with bile, which is produced by the liver, and pancreas juices, which are produced by the pancreas.

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The food mixture is broken down into proteins, carbohydrates, vitamins, minerals, and fats.

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These nutrients pass through the small intestine and are absorbed into the blood.

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The waste that our body does not need passes to the large intestine.

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Here, water from this waste is absorbed into the blood.

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The solid waste leaves our body through the anus.