Question

Classify the following based on the number of chambers in their heart.
Rohu, Scoliodon, Frog, Salamander, Flying lizard, King cobra, Crocodile, Ostrich, Pigeon, Bat, Whale

Answer 1

Hint: Human beings have a heart which has four chambers. However, not all the organisms have a heart which has four chambers. Some organisms have a two-chambered heart, some organisms have a three-chambered heart and other organisms have a four-chambered heart. Generally, the 2-chambered heart is a humble organ that pumps the blood for animals which have gills and which need single circulation.

Complete answer:
The organism which has two chambers in their heart has gills and they follow single blood circulation. In such organisms, the blood leaves the gills of the organism and then it directly mixes with the rest of the parts in the body.

Fishes like Rohu Dogfish, Electric ray, Seahorse, are the marine and cold-blooded creatures with a two-chambered heart.

The organisms which have the heart consisting of three chambers also have discrete circuits of lifeblood vessels for oxygenating blood and they transport it to every part of the body.

Amphibians such as Frogs, Toads, Salamanders have mucus secretions in their skin and they are three-chambered hearts.

As we know, the four-chambered heart allows the organism to send its "murky" blood to the cleaners, the lungs, and its "fresh" blood to the rest of the parts of the body without making the blood get mixed. Thus, this system is very competent.

Reptiles have an incomplete four-chambered heart like the flying lizard, King Cobra.

All mammals and birds like Ostrich, Pigeon, Bat, whale, etc possess a four-chambered heart. The only reptile that possesses a four-chambered heart is Crocodile.

Note: In general, most of the amphibians and the reptiles have a heart that consists of three chambers. However, there are some exceptions too. Such a type of heart contains two atria and a single ventricle. Normally. The mammals contain a four-chambered heart, however, there are some exceptions. Normally in fishes, the heart does not necessitate extra chambers under the first two ones.