Altocumulus and altostratus clouds usually bring cold, windy conditions. If you come across this type of weather make shure you are protected from drizzle or light snow.
Gas exchange of oxygen and carbon dioxide takes place in the alveoli . Oxygen from the inhaled air diffuses through the walls of the alveoli and adjacent capillaries into the red blood cells . The oxygen is then carried by the blood to the body tissues . They are surrounded by numerous capillaries
