In this deck, we'll explore two vital organs involved in sensing and coordinating your body's actions: the brain and the eye. We will cover the main parts of the brain and their jobs, the challenges scientists face when studying it, and then move on to the detailed structure of the eye. Finally, we'll learn how the eye cleverly adjusts its focus for near and distant objects. Both the brain and the eye are often shown in diagrams in your exam, so it's a good idea to study labelled diagrams alongside this audio deck.

The brain is the main control centre of the body and part of the central nervous system. It's an incredibly complex organ, made of billions of interconnected neurones. For GCSE Biology, you need to know about three main regions: the cerebrum, the cerebellum, and the medulla oblongata.

Located at the back of the brain, underneath the cerebrum, is the cerebellum. While the cerebrum handles conscious thought, the cerebellum is all about coordination. It's responsible for coordinating muscular activity and for balance. Think about walking, running, or riding a bike – your cerebellum is working hard to make those movements smooth and controlled.

The final part you need to know is the medulla oblongata, which is found at the base of the brain, connecting it to the spinal cord. This part of the brain is crucial for survival as it controls unconscious activities that you don't have to think about, such as your breathing rate and your heart rate.