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 in the lungs takes place between the blood in the capillary network surrounding the alveoli and the air in the alveoli itself all of the blood from the right ventricle flows through the pulmonary artery to the capillary network which surrounds the alveolias exchange between the air within the alveoli and the pulmonary capillaries occurs by diffusion the oxygen must first dissolve before passing through the respiratory epithelium gas moves from a region of high partial pressure to a region of low partial pressure down a partial pressure gradient