Diffusion is the out of a gas or liquid as their move and mix. Diffusion only takes place if there is a in concentration of the substance. This is known as the concentration . The substance moves from concentration to area of lower concentration. The higher the concentration gradient the the rate of diffusion. Small molecules diffuse more than large ones. Copy the diagram below and explain how glucose and oxygen diffuse from capillaries into respiring cells, and how carbon dioxide diffuses from respiring cells into capillaries :
Copy the diagram below and explain how glucose and oxygen diffuse from capillaries into respiring cells, and how carbon dioxide diffuses from respiring cells into capillaries :
