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.
Gas Exchange. Gas exchange refers to the passing of Oxygen from the alveoli into the blood flow and the excess Carbon Dioxide (CO2) within the blood flow passing back into the alveoli to be breathed out. Each tiny alveoli is covered in a network of capillaries (tiny blood vessels) which make this process easier.