Posts tagged ‘Gills’

Do fish drink the water they live in?

Fish

Fish consume the water they inhabit if it agrees with their system.  Since the bodies of freshwater fish are much saltier than the water they live in, they don’t drink.

They are in danger of too much water entering their bodies, diluting their body fluids. They urinate often to get rid of any extra water that soaks into their bodies.

Saltwater fish, however, drink large amounts of water, since the salty sea water absorbs moisture from their bodies, causing dehydration.  These fish eliminate excess salt through their gills and very concentrated urine.–Dick Rogers

How can fish breathe in water?

Fish breathe with gills, which are inside the fish’s head on each side of its throat.  The gills are made of a thin material that allows the fish’s blood to come close to the surface of the gills.  Water contains large amounts of oxygen.

When a fish breathes, it takes a mouthful of water, and then closes its mouth.  This forces the water pass the gills.  The oxygen in the water is absorbed through the think surfaces of the gills, and into the fish’s blood.  The water then leaves the fish’s body through narrow gill slits on each side of its heard.–Dick Rogers

Can fish drown?

Fish can drown under certain conditions.  It is not the water that keeps fish alive, but the oxygen in the water.  Fish breathe oxygen, just as we do.  The water contains oxygen that comes from the air or is given off by water plants.

A fish takes the oxygen out of the water by means of its gills.  When a fish is placed in a small tank of water, however, it may soon use up all the oxygen that is in the water.

If this happens, the fish suffocates.  This is why, if you keep pet fish, you must change the water frequently in order to give them a fresh supply of oxygen.–Dick Rogers

What is salamander?

A salamander is a harmless creature that looks like a lizard, but it is related to the frogs and toads.

Salamanders’ bodies and long tails make them look so much like lizards that they are often mistaken for them.   It is easy to tell them apart.  Lizards are covered with dry scales.

Salamander

Salamander has smooth, shiny skin that always looks wet.  Salamanders are timid, harmless creature.  They love to live in streams and ponds, on land beneath stones and rotting logs where it is cool, dark and moist.

They live in a stream or a pond as tadpoles and breathe with gills like fish.  But when grown-up, they have  legs and come ashore and breathe air with lungs.  Salamanders have a special name because they start life in the water then crawl out onto land.  They are called “amphibians,” which means “leading a double life.”

There are many kinds of salamanders.  Mud puppies, newts, and hellbenders are the names of the few.  Not all salamander live a double life.  The mud puppies and hellbenders spend their entire life in the water.  – Dick Rogers

 

 

 

Did you know that a tadpole becomes a frog?

The common pond frog’s life begins in a quiet pond as one of many jelly-like eggs laid together in a mass by the mother frog.

In a few days, the egg hatched into a tiny, legless tadpole that breathes with gills, as fish do.  it has a long tail which it uses for swimming, and eat plants that grow in the water.

Tadpole-to-frog

As the tadpole grows, first two hind legs and then two front legs appears.  After a time the tail begins to shrink and the tadpole loses its gills and gets lungs instead.

Then the tadpole comes to the surfaces of the water to breath air.

At last its tail disappears and the change is complete.

As a young frog, the creature is now ready to leave the water and begin a life as a hoping land animal.

Most tadpole make the change into frogs in the three months of spring.  Most toads begin life a tadpole, much like frogs do. – Dick Rogers

 

What is a lungfish?

Lungfish

Did you ever hear of a fish that could live our of water?  The lungfish can.

As one would guess by its name, the lungfish has a lung, as well as gills, that enables it to live out of the water.  Lungfish live in Africa, South America, and Australia.

The African lungfish is probably the best know it is also called a mudfish.  The African lungfish ahs an eel-shaped body that may grow to be over a foot long.

It lives in swamps and muddy rivers of Africa.  In the summer the streams in which the lungfish lives may dry up for months at a time.

As the dry season nears, the lungfish burrows deep in the mud.  It can spend the whole summer in its cocoon of hardened mud beneath the dried-up stream bed, getting air through a small hole and living on fat stored in its own body.

When  the wet season comes, the water softens the hard mud cocoon and the lugnfish swims about again.

Did you ever hear of a fish that could live our of water?  The lungfish can.

As one would guess by its name, the lungfish has a lung, as well as gills, that enables it to live out of the water.  Lungfish live in Africa, South America, and Australia.

The African lungfish is probably the best know it is also called a mudfish.  The African lungfish ahs an eel-shaped body that may grow to be over a foot long.

It lives in swamps and muddy rivers of Africa.  In the summer the streams in which the lungfish lives may dry up for months at a time.

As the dry season nears, the lungfish burrows deep in the mud.  It can spend the whole summer in its cocoon of hardened mud beneath the dried-up stream bed, getting air through a small hole and living on fat stored in its own body.

When  the wet season comes, the water softens the hard mud cocoon and the lugnfish swims about again. – Dick Rogers