They are seized by an uncontrollable urge to move their legs. Their legs actually twitch or jerk, while they experience the sensation of something squirming or wiggling under their skin. Consequently, restless legs syndrome can lead to problems associated with sleep deprivation, such as anxiety and depression.
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 alveoli.as 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.
it is made up of the alveoli's because they have very thin walls, only one cell thick to allow exchange/diffusion of gases through it and interchange of these gases with the blood, the capillary network means the gases can be easily delivered to the lungs and absorbed into the blood at the lung surface.est Answer: Alveoli are the actual sites of gas exchange between the lungs and the blood. They are incredibly thin to allow easy diffusion of gases (oxygen and carbon dioxide) back and forth.