Understanding Osmosis in Fish

The video explains how fish drink water through osmosis, depending on their environment. Freshwater fish absorb water through their gills due to lower water concentration in their blood compared to the surrounding water. They urinate frequently to expel excess water. Saltwater fish drink water through their mouths because their blood has a higher water concentration than the surrounding saltwater. They filter the water and expel excess salt through urination.

How do fish primarily take in water?

• Through their skin

• Through their mouth or gills

• By absorbing it through their fins

• Using a straw

Why do freshwater fish absorb water through their gills?

• Their blood has more water than the surrounding water

• Their blood has more salt than the surrounding water

• They need to expel salt

• They need to breathe

What happens to the excess water in freshwater fish?

• It is expelled through their skin

• It is urinated out

• It is converted to salt

• It is stored in their body

How do saltwater fish maintain water balance?

• By gulping saltwater through their mouth

• By drinking freshwater

• By not drinking water at all

• By absorbing water through their skin

What do saltwater fish do with the excess salt?

• Expel it while urinating

• Use it for energy

• Convert it to water

• Store it in their body