Genetics: Genome Screening & Sex Determinatio...

In this episode, we will discuss the alveoli in the circulatory system.Alveoli are microscopic air sacs within the lungs where the crucial exchange of oxygen and carbon dioxide occurs between air and blood through diffusion. Their structure is highly adapted for this vital proces ...  Show more

In this episode, we look at transportation in cells. We will explain how substances move into and out of cells, highlighting three key mechanisms. Diffusion is described as the movement of particles from high to low concentration areas. Osmosis is presented as a specific type of ...  Show more

Richard looks at different bond types for your GCSE Chemistry exam. In this episode, he will look at the different types of chemical bonds that exist. Suitable for AQA, OCR, Edexcel, CIE and WJEC exam boards. Ideal for preparing your GCSE Chemis ...

Richard looks at displacement reactions for your GCSE Chemistry exam. In this episode, he will look at when and why displacement reactions occur. Suitable for AQA, OCR, Edexcel, CIE and WJEC exam boards. Ideal for preparing your GCSE Chemistry</ ...

Richard looks at noble gases &amp; halogens for your GCSE Chemistry exam. In this episode, he will look at what properties and trends of noble gases and halogens. Suitable for AQA, OCR, Edexcel, CIE and WJEC exam boards. Ideal for preparing your <a href="http://bit.ly/2to1 ...

Richard looks at atomic size &amp; number for your GCSE Chemistry exam. In this episode, he will look at how big an atom is and what atomic number and mass number are. Suitable for AQA, OCR, Edexcel, CIE and WJEC exam boards. Ideal for preparing your <a href="http://bit.ly ...