Once this type of retinal detachment develops and causes symptoms, it can progress to total blindness if it is not repaired promptly. In the United States, retinal detachment is a relatively uncommon condition, affecting only one of every 10,000 Americans each year.
Gas exchange in reptiles still occurs in alveoli however, reptiles do not possess a diaphragm. Thus, breathing occurs via a change in the volume of the body cavity which is controlled by contraction of intercostal muscles in all reptiles except turtles.
What are the structures in the lungs where gas exchange takes place? The alveolus (plural = alveoli) is the tiny air sac in the lung  where gas exchange occurs. Oxygen from the inhaled air diffuses  through the walls of the alveoli and adjaceâ¦nt capillaries into the  red blood cells.