Fishes gills are engorge in blood , as water is pumped over it as the fish swims, it pulls water thru it's mouth and pushes it over it's gills extracting oxygen and the used water is ejected thru the fish slits opening that cover and protect the gill. the blood is circulated thru the fish body.
A specific organ on which a hormone, drug, or other substance acts
12. it should not be left in a hot car because it could explode when the pressure gets to high (this is why i assume)
Chlorophyll is the pigment in chloroplasts that makes a plant looks green
