Neither. It is a fish. That is why it is called a “Puffer fish.”
Reptiles, birds, mammals and most adult amphibians have lungs , but young amphibians have gills rather than lungs. Some amphibians retain gills for all their lives. Some salamanders lack lungs and breath through their skin. Most fish have gills and not lungs, though there are lungfish.
Amphibians have third heart chamber and a double circuit pump. This third chamber helps to keep the oxygenated and deoxygenated blood separate. The oxygenated blood from the lungs enters the left atrium while the deoxygenated blood from the tissues arrives at the right atrium. The blood is then emptied into the single ventricle which allows some of oxygenated blood to mix with the deoxygenated blood as it is being pumped to the lungs and tissues.
Lungfish, however are the closest living aquatic relatives to amphibians. They only have a single atrium that is partially divided by an interatrial septum.
None of the above. Fish are a branch of animals all their own.
The lobster's class is malacostracan, which is one of the six types of crustaceans.
Neither. It is a fish. That is why it is called a “Puffer fish.”
Mammals, birds, reptiles and adult amphibians breathe using lungs. Fish breathe using gills, while juvenile amphibians breathe using gills and spiracles.
Birds, reptiles and most amphibians breathe through lungs.
Mammals have lungs, as do amphibians, reptiles, and birds. Fish are the only chordates that have gills rather than lungs.
Reptiles always breathe with lungs. Amphibians may breathe with lungs, gills or through their skin.
Yes. Possums are mammals, and all mammals breathe through lungs, just as birds, reptiles and adult amphibians do.
yes
Most land vertebrates including all birds, mammals, and reptiles have lungs. Most amphibians have lungs as well, though some salamanders breathe through their skin or through gills. A few types of fish have lungs as well Spiders and gastropods and among the few invertebrates to have lungs. Most breather passively through spiracles, their skin, or through gills.
Here they are, from oldest to most recent on the evolutionary tree. In parenthesis after the groups are major adaptions which distinguish a group from the one that came before it. Fish Amphibians (lungs in adult stage) Reptiles (lungs) Birds (warm-blooded) Mammal (give birth to live young)
A reptile egg is much much much softer than birds egg.
Reptiles, amphibians and fish are all cold-blooded vertebrates.
When amphibians are babies, they have gills, but most adult amphibians breathe with a pair of lungs excluding salamanders.
Coldblooded vertebrates include the fish, the amphibians and the reptiles. There are a actually fish with lungs, lungfish. Some species of lungfish have more or less working gills, but most species need to breath using their lung(s) even when in the water. Amphibians all have a juvenile water-breathing form, no exceptions to my knowledge. Their adult form has lungs. Reptiles (crocodiles, snakes, lizards, turtles) are the group you are probably looking for. These breath using their lungs.