What Does The Stomach Do | Physiology | Biology | FuseSchool
The stomach is an amazing organ.
It varies in size from person to person but can contain up to 2 litres of food and liquid.
The stomach is one of the organs in the digestive system. It is essentially a bag of muscle where food is kept for up to 2 hours whilst various things happen to it.
There are two types of digestion that occur in the human body: mechanical and chemical. They both occur in the stomach.
The innermost tissue in the stomach is called the mucosa. This layer contains cells that secrete something called gastric juice into the stomach. It contains mucus, digestive enzymes and hydrochloric acid.
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Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions.
In this video we look at how to simplify algebraic fractions, and how to add and subtract them.
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CREDITS
Animation & Design: Peter van de Heuvel
Narration: Lucy Billings
Script: Lucy Billings
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VISIT
In algebra we have lots of different names for different things: expressions, equations, formulae and identities are all slightly different versions of similar things. Then within these, we have variables, constants, coefficients and exponents to describe the different parts. We also need to know wh