All living organisms can respire in some form, including animals, plants, fungi, and even some bacteria. Respiration is the process by which organisms take in oxygen and produce carbon dioxide to generate energy for survival.
No, not all organisms breathe. While most animals have a respiratory system that involves breathing to exchange gases like oxygen and carbon dioxide, some organisms like plants and certain microbes rely on different mechanisms, such as photosynthesis or simple diffusion, to obtain the gases they need.
Some anaerobic bacteria and archaea can perform respiration without oxygen, using alternative electron acceptors such as nitrate, sulfate, or carbon dioxide. These organisms are known as facultative anaerobes.
Rabbits, like all mammals, have lungs, not gills. Lungs are the respiratory organs of mammals, including rabbits, and they are adapted for breathing air. Gills, on the other hand, are the respiratory organs of aquatic animals such as fish and some amphibians. Gills are specialized for extracting oxygen from water, whereas lungs are designed for extracting oxygen from the air. Rabbits breathe by inhaling air through their nostrils, which then passes into their lungs, where oxygen is exchanged with carbon dioxide in the blood.
Earth is a terrestrial planet
Terrestrial animals are those animals that live almost all of their life on land. An example of some terrestrial animals include, cats, ants, dogs, and giraffe.
Animals that have gills include fish, some amphibians like tadpoles, and certain invertebrates such as mollusks, crustaceans, and some insects in their larval stages. These gills enable these animals to extract oxygen from water for respiration.
fish
Some examples of animals with gills are fish, tadpoles, and marine invertebrates like clams and jellyfish. Gills are respiratory organs that allow these animals to extract oxygen from water.
If your imaginary critter is crablike, then I assume it's a crustacean, or at least some kind of terrestrial arthropod. You already know that crabs respire through gills, which work in water but not in air. However, your creature lives in sand dunes, so it'll need some kind of respiratory structure that does work on land. The land crab you mentioned, the red crab (Gecarcoidea natalis) belongs to the family Gecarcinidae, all of which are terrestrial as adults. These animals still use gills for gas exchange. However, the chamber that encloses the gills (the branchial chamber) has become highly vascularized and acts as a lung. In other words, the gills hang in the branchial chamber as in "normal" crabs, but respiratory gas exchange occurs across the surface of the chamber itself as well as over the gills. Most of the terrestrial crabs live either in burrows or in shells (hermit crabs). The burrows protect the animals from predation, temperature extremes, and desiccation. Air-breathing animals can lose a lot of precious water via evaporation over their respiratory surfaces, so lungs and branchial chambers are usually enclosed structures with only a small opening to the outside. Living in a burrow gives a land crab additional protection against desiccation -- the air inside the burrow will be more humid than the air outside, and less subject to drying winds. The burrow also provides an air-filled pocket in the ground (or sand dune, in the case of your imaginary animal) so the crab can breathe. Your imaginary crablike animal could respire and live in a burrow as the gecarcinids do. It would most likely need to return to the sea to reproduce, though. Even the terrestrial red crab has a more or less coastal distribution, because females release their larvae into the ocean. I hope this answers your question. Have fun designing your critter! offei kwesi abela.k.a aSepso
A snail is an invertebrate gastropod mollusc. Some respire with a lung while sea snails have gills.
All living organisms can respire in some form, including animals, plants, fungi, and even some bacteria. Respiration is the process by which organisms take in oxygen and produce carbon dioxide to generate energy for survival.
Some animals have gills and mammals go up to the surface for air
Land animals are also called terrestrial animals, as opposed to sea organisms that are called marine organisms. Some animals are classified as terrestrial because they are predominantly on land, although they also live or hunt in the sea (e.g. penguins).
Crabs have gills. The underwater ones have larger gills than the terrestrial ones. Terrestrial crabs use the humidity in the air to breathe. this is why crabs live near water even if they are land dwellers. some crabs have very small and basic lungs but these cannot function without water and are usually attached to some sort of gill.
There are several ways animals breathe. Most mammals, reptiles and birds use lungs to do so, while some amphibians and fish use gills. Some fish have an air bladder, which is kind of like a primitive lung and allows them to live in oxygen depleted bodies of water. Other amphibians and more primitive creatures can respire through their moist skin.
If your imaginary critter is crablike, then I assume it's a crustacean, or at least some kind of terrestrial arthropod. You already know that crabs respire through gills, which work in water but not in air. However, your creature lives in sand dunes, so it'll need some kind of respiratory structure that does work on land. The land crab you mentioned, the red crab (Gecarcoidea natalis) belongs to the family Gecarcinidae, all of which are terrestrial as adults. These animals still use gills for gas exchange. However, the chamber that encloses the gills (the branchial chamber) has become highly vascularized and acts as a lung. In other words, the gills hang in the branchial chamber as in "normal" crabs, but respiratory gas exchange occurs across the surface of the chamber itself as well as over the gills. Most of the terrestrial crabs live either in burrows or in shells (hermit crabs). The burrows protect the animals from predation, temperature extremes, and desiccation. Air-breathing animals can lose a lot of precious water via evaporation over their respiratory surfaces, so lungs and branchial chambers are usually enclosed structures with only a small opening to the outside. Living in a burrow gives a land crab additional protection against desiccation -- the air inside the burrow will be more humid than the air outside, and less subject to drying winds. The burrow also provides an air-filled pocket in the ground (or sand dune, in the case of your imaginary animal) so the crab can breathe. Your imaginary crablike animal could respire and live in a burrow as the gecarcinids do. It would most likely need to return to the sea to reproduce, though. Even the terrestrial red crab has a more or less coastal distribution, because females release their larvae into the ocean. I hope this answers your question. Have fun designing your critter! offei kwesi abela.k.a aSepso