Yes, they are reptiles.
Crocodiles, alligators, caimans and gharials all have four-chambered hearts.
Yes. All reptiles have hearts.
Some do. Crocodilia, which includes crocodiles, alligators, caimans and gharials, all have four-chambered hearts. Most others have three-chambered hearts.
Fish are the animal group that have two-chambered hearts. Reptiles and amphibians have three-chambered hearts and mammals have four-chambered hearts.
Fish are the animal group that have two-chambered hearts. Reptiles and amphibians have three-chambered hearts and mammals have four-chambered hearts.
Fish are the animal group that have two-chambered hearts. Reptiles and amphibians have three-chambered hearts and mammals have four-chambered hearts.
Reptiles and amphibians are the vertebrates that have three-chamber hearts.
All extant reptiles, with the exception of crocodilians, have a three chambered heart. That means lizards, snakes, tuataras, and turtles have three chambered hearts. Crocodilians are the only animals with four chambered hearts that are not warm blooded.
T-rex had one heart just like any other vertebrate.
With the exception of crocodilians, reptiles and amphibians have only two chambers in their hearts: two atria and a single ventricle. The single ventricle allows oxygenated blood to mix with deoxygenated blood.
Three-chambered hearts have two atria and one ventricle. The two atria receive blood from the body and lungs, while the single ventricle pumps blood out to the body and lungs. This type of heart is found in some reptiles and amphibians.