[ 2007-04-09 13:43 ]
Can a fish drown?
Fish, like people, need oxygen to live.
A fish out of water is a fish out of its element. A fish comes fully equipped
with a pair of gills, which it uses
to breathe under water. The gills extract life-sustaining oxygen from the
hydrogen in the water molecules, in order to regulate the amount of
oxygen intake. This maintains the necessary balance of the two components of
water for the fish to survive.
When a fish is taken out of water, and exposed only to air, not to oxygen and
hydrogen containing water, its gills are unable to control the oxygen intake,
the delicate balance cannot be maintained, and the gills inhale a lethal overdose of oxygen. The fish essentially
experiences death by "drowning."
（英语点津 Annabel 编辑）