110 Coolster , gas & spark but no start. My GF's boy has a 2 yr old Coolster 110cc (Kazuma I believe but not 100%) Well it ran fine the other day...he rode it for an hour with a few breaks here and there.
Gas exchange is a biological process through which different gases are transferred in opposite directions across a specialized respiratory surface. Gases are constantly required by, and produced as a by-product of, cellular and metabolic reactions, so an efficient system for their exchange is extremely important. It is linked with respiration in animals, and both respiration and photosynthesis in plants.
in respiratory system: The gills. ...by bony plates (the operculum). A pair of gill filaments projects from each arch; between the dorsal (upper) and ventral (lower) surfaces of the filaments, there is a series of secondary folds, the lamellae, where the gas exchange takes place.