Question

Name the reptile that has a four-chambered heart.

Answer 1

Hint: Reptiles are the group of vertebrates, which belong to the class Reptilia. All the animals which come under reptiles have some characteristic features which separate the reptiles from all other animals. But most of the features have been modified by recent times.

Complete answer:
> Generally, all Reptiles contain three-chambered hearts except one which is a crocodile.
> The reptiles having three-chambered hearts consist of two atria and one ventricle.
> When comes to circulation, All the blood from the body parts which becomes deoxygenated enters the right atrium.
> From the right atrium, the blood enters the ventricles, from which it is pumped to the lungs.
> In the lungs, the blood is oxygenated and enters the left atrium, from where the blood is distributed to all body parts, and the cycle repeats.
> Unlike in all reptiles, crocodiles are different, they are big lizard-like looking reptiles.
> The hearts of crocodiles are a little complex; they contain 4 chambers just like in birds and mammals.
> It contains two atria and two ventricles, both left and right aorta and left are connected by the Foramen of Panizza.
> Normally in reptiles, the oxygenated and deoxygenated blood are mixed up with each other.
> But in crocodiles, the blood is sent to the lungs for gas exchange, and from the right ventricle from the left ventricle, is pumped to the body parts.
> So the two types of blood do not mix up each other in this heart.
> However, once the blood leaves the heart it used to mix up at the valves in the area of right and left aorta.

Note:
Recent researchers said that the crocodile heart has a unique type of valve which maintains the proper blood flow between the lungs and the body parts, this valve contains cog teeth which were made up of nodules like connective tissue, these cog teeth helps to diversify the blood from the lungs and to the body parts.