'In these organs in most fish, water flows the opposite direction to the blood, increasing oxygen transfer'
gills
MARINE BIOLOGY: In these organs in most fish, water flows the opposite direction to the blood, increasing oxygen transfer
In these organs in most fish, water flows the opposite direction to the blood, increasing oxygen transfer
In these organs in most fish, water flows the opposite direction to the blood, increasing oxygen transfer
MARINE BIOLOGY
gills
MARINE BIOLOGY