During its lifetim, a Pacific Ocean salmon reproduces a
only once
every year
twice each year

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.