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  1. Breathing and circulation

    Duration: 03.03

    Watch Clip duration: 03.03

    An explanation of the process of breathing and how blood is transported around the body.

  2. Cells, tissues and organs in plants

    Duration: 01.48

    Watch Clip duration: 01.48

    Specialised cells in plants are organised into tissues, organs and systems.

  3. Demonstrating urine recycling

    Duration: 03.20

    Watch Clip duration: 03.20

    A demonstration of how drinking water can be extracted from human urine.

  4. Digestive enzymes

    Duration: 02.52

    Watch Clip duration: 02.52

    The roles of different enzymes in digestion are discussed with an overview of digestion.

  5. Enzymes and active sites

    Duration: 02.36

    Watch Clip duration: 02.36

    Jon Chase demonstrates the action of the enzyme catalase.

  6. Food as a fuel

    Duration: 02.10

    Watch Clip duration: 02.10

    A screaming jelly baby is demonstrated to show the energy content of food.

  7. How the brain's pituitary gland controls water concentration of the blood

    Duration: 01.19

    Watch Clip duration: 01.19

    A description of how parts of the brain control water concentration of the blood.

  8. Nutrient groups and digestion

    Duration: 03.05

    Watch Clip duration: 03.05

    The way we digest food is defined and the seven main nutrient groups are described.

  9. The cell membrane

    Duration: 01.02

    Watch Clip duration: 01.02

    The process of diffusion is explained with reference to a cell membrane.

  10. The digestive system

    Duration: 01.38

    Watch Clip duration: 01.38

    Animated description of the digestive process and the structures of the digestive system.

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