The Effects of Lung Disease There are several disorders or diseases that can prevent lungs from functioning properly They can affect the structure of the alveolar walls (gas exchange surface...
Maths Skill: PVR The volume of air within the lungs of an individual will change depending on their level of activity When at rest, breathing is shallow and steady When exercising, breathing...
Ventilation & Gas Exchange Gas exchange in the lungs requires a concentration gradient Ventilation (mass flow of gases) in the lungs and the continuous flow of blood in the capillaries h...
Edexcel IGCSE Maths 复习笔记 3.9.1 F What is a non-linear graph? A linear graph is a straight-line graph These are easily identified as their equations can always be written in the form y = m...
Edexcel IGCSE Maths 复习笔记 3.8.1 Transformations of Graphs What are graph transformations? You should have come across transformations of shapes – reflections, rotations, translations and enlarge...
Edexcel IGCSE Maths 复习笔记 3.7.1 Perpendicular Lines What are perpendicular lines? You should already know that PARALLEL lines have equal gradients PERPENDICULAR LINES do meet each other and wher...
Edexcel IGCSE Maths 复习笔记 3.6.2 Straight Lines - Drawing Graphs How do we draw the graph of a straight line from an equation? Before you start trying to draw a straight line, make sure you under...
Edexcel IGCSE Maths 复习笔记 3.6.1 Straight Lines - Finding Equations Why do we want to know about straight lines and their equations? Straight Line Graphs (Linear Graphs) have lots of uses in math...
Edexcel IGCSE Maths 复习笔记 3.5.1 Coordinates What are coordinates? When we want to plot a point on a graph we need to know where to put it If the horizontal axis is labelled x and the vertical ax...
