Human Defence Systems - GCSE Biology

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

Day two of Immunity Week! Five episodes in Five days all on the topic of Immunity. Today we learn all about Cell Mediated and Humoral Immunity. Find us on the internet!Our website - Teachmescience.co.ukEmail - teachmebiologycast@gmail.comTwitter - twitter.com/teachmebiocastInstag ...  Show more

This week, Emma's got the lowdown on facilitated diffusion and polarized membranes for your AP Bio exam. She looks at how molecules diffuse through carrier proteins or channel proteins in membranes. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A ...  Show more

Biology/Biochemistry: In this fourth episode of biology/biochemistry, we talk about the digestive system. Topics like the anatomy, enzymes, hormones, and more. 

This episode reviews the topic of cells, including: The levels of organisation in multicellular organisms. The differences between animal and plant cells and the process of cell differentiation and the uses of stem cells. This episode is suitable for all examination boards but mo ...  Show more