the body structure circulatory systems provides actual diffusion of respiratory gases in lungs.
the body structure circulatory systems provides actual diffusion of respiratory gases in lungs.
which body structure provides actual diffusion of respiratory gases in lungs?
circulatory systems
section::::physical principles of gas-exchange.:interaction with circulatory systems.









































in multicellular organisms therefore, specialised respiratory organs such as gills or lungs are often used to provide the additional surface area for the required rate of gas exchange with the external environment. however the distances between the gas exchanger and the deeper tissues are often too great for diffusion to meet gaseous requirements of these tissues. the gas exchangers are therefore frequently coupled to gas-distributing circulatory systems, which transport the gases evenly to all the body tissues regardless of their distance from the gas exchanger.
gas exchange
respiratory humidification during surgery helps maintain body temperature and normal function of the respiratory mucosa. in the same way that some animals pant to lose excess body heat, heat is lost through the lungs during mechanical or assisted ventilation. heated humidification of respiratory gases during surgery has been demonstrated to reduce the fall in core body temperature, especially in surgeries lasting longer than one hour. the lungs can be insufflated with respiratory gases that are heated to near body temperature and humidified to 90 to 100% relative humidity(rh). normally, air in the lungs is at core body temperature and at close to 100% rh. especially when cold dry gases (such as anhydrous compressed gas from oxygen tanks) are used, it cool and can dry the airway. the body then utilizes energy to evaporate sufficient water from the lungs to maintain lung gas temperature and humidity. it is generally estimated that 10 percent of the loss of body heat during surgery is from the respiratory tract. especially in open surgery (rather than endoscopic / robotic surgery), respiratory humidification can be used in concert with forced air warming blankets or gowns, warmed iv, and irrigation fluids to prevent hypothermia.
surgical humidification