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.
The key exchange between the blood and body cells are the gases involved with cellular respiration. Carbon dioxide produced by respiration is absorbed by the blood, and oxygen â¦ being carried by hemoglobin in the blood is diffused into the cells. Both of these exchanges happen due to concentration gradients.he capillary is the only blood vessel where things can be  exchanged because it is so thin (one cell thick). Capillaries have  a single cell layer of squamous epithilium.