Our digestive system breaks down large, insoluble molecules into small, soluble molecules for absorption through the small intestine wall. The parts of our digestive system are neutral, acidic and basic. This affects the enzymes that are found there to speed up the rate of a reaction.
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How do we stay healthy?
The major systems in the body need to work together so that we can function normally. To maintain good health, body systems are checked using technologies that can detect problems.
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How do humans reproduce?
To pass on our genes to the next generation, humans must reproduce. Sperm and egg cells join in a process called fertilisation and an embryo develops.
Advances in medicine have allowed infertile couples to conceive and such technology is exploring the potential uses of stem cells in treating diseases.
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How do we make food?
To have enough food for ourselves, we must understand how plants make their food from the sun and how they reproduce. Photosynthesis affects atmospheric gases.
Humans use fertilisers to change the make-up of soils so that plants grow faster and stronger.
Plants are the start of every food chain and also contribute to the carbon cycle which recycles nutrients in the environment.
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Our methods of generating energy causes pollution in water and air environments. This pollution negatively affects food chains and causes diseases. This pollution is causing
Planet Earth to warm. We are trying to stop this and explore different ways of generating electricity that are less harmful to the environment. Pollution also encourages the spread of diseases, some of which can be treated by medicines.
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