Features of the Alveoli 0.0 / 5 ? BiologyRespiration and exerciseIGCSEAQA Created by: Nicole DCreated on: 19-12-13 10:37 Features of the Alveoli 5 Questions 1 of 7 Name the 4 features of the alveoli helping to maximise the rate of diffusion Lots of them + in a spherical shape ; Rich supply of blood capillaries ; Very thin alveolus wall ; Moist surface 2 of 7 Explain what each of the following features do to maximise diffusion... . 3 of 7 Lots of them and of a spherical shape Gives a relatively large surface area for diffusion ; Allows a lot of oxygen in ; So sides don't stick together 4 of 7 Rich supply of blood capillaries Maintains concentration gradient ; Gas exchange takes place along the steepest concentration gradients possible 5 of 7 Very thin alveolus wall Gives a short distance between air and the blood making diffusion easy 6 of 7 Moist surface So sides of the alveoli don't stick together 7 of 7
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