How do land animals and underwater animals get air?

Answer 1

Animals living in land are called terrestrial animals .All terrestrial animals breathe through their nostrils.but they respire through their lungs.aquatic animals such as fishes breathe through their gills.Gills a re the projections from their skin,they are themselves well supplied with oxygen.Amphibians such as frogs crocodiles crabs etc can live in both land and water.they do have lungs to breathe in land but in water, they breathe through their skin.insects like grass hoppers cockroaches etc. breathe through spiracles.Spiracles are just like our nostrils.they are holes by which they exchange gases.{oxygen and carbon dioxide}.But originally insects respire through trachea.The earth worms are insects that only breathe through their skin.Their skin are slimy and watery so gases can easily pass through them.

improvements

crocodiles and crabs are not amphibia

gills are not projection from skin in all aquatic animals

nostrils and spiracles are part of respiratory system not a separate thing.

Answer 2

The differences are that aquatic animals live under water and breath under water, but the land animals can not breath under water so they have to live on land and if aquatic animals lived on land for less than a hour they would die. And same with land animals if they were under the water for to long they would drown!

Answer 3

The component of air needed by animals is oxygen. Land animals get oxygen by absorbing it from the air (mammals, reptiles, amphibians, and birds do this by inhaling and absorbing oxygen inside the lungs, whereas invertebrates simply absorb it through tiny tubules that let air into their bodies). Fish and other marine animals (with the exception of marine mammals and reptiles) get oxygen by absorbing the dissolved oxygen in the water. For marine mammals and reptiles, oxygen is obtained by surfacing every so many minutes to take a breath of air.

Answer 4

Water contains much less O2 than air per unit volume.

Answer 5

Gills are used to filter out the Oxygen (O) from water (H2O). Land animals do not need to do this as we breathe air.

Answer 6

A Frog