faisal Messages 46 Reaction score 0 Thread starter Sep 29, 2004 #1 The flow of water and ventilation system in fish is 1 way, where as in mamals the flow of gases is in 2 ways. why is this?
The flow of water and ventilation system in fish is 1 way, where as in mamals the flow of gases is in 2 ways. why is this?
Jikx Messages 206 Reaction score 0 Sep 29, 2004 #2 gills are open ended.. lungs have only one point of entry/exit !