In which of the following vertebrate group/groups, the heart does not pump oxygenated blood to different parts of the body?
In which of the following vertebrate group/groups, the heart does not pump oxygenated blood to different parts of the body?
The correct option is D Pisces only
The correct option is D:
Explanation of the correct option:
- Fish belong to the phylum Vertebrata's class Pisces, which has only one blood circulation circuit.
- A two-chambered heart with one auricle and one ventricle makes up the heart of a fish.
- The atrium receives deoxygenated blood that returns from body cells via the sinus venosus, and the ventricle, a thick-walled chamber, pumps it to the gills.
- Gills are the sites where gaseous exchange takes place and the blood is oxygenated by dissolved oxygen in the water.
- After that, the oxygenated blood travels to the rest of the bodily cells before returning to the atrium.
Explanation of the incorrect option:
Option A:
The heart of an amphibian has three chambers with one ventricle and two atria that pumps a mixture of oxygenated and deoxygenated blood.
Option B:
Except for the crocodile, amphibians, and reptiles have a three-chambered heart with one ventricle and two atria that pumps a mixture of oxygenated and deoxygenated blood.
Option C:
The heart of an amphibian has three chambers with one ventricle and two atria that pumps a mixture of oxygenated and deoxygenated blood.
Final answer: Fish belong to the phylum Vertebrata's class Pisces in which heart does not pump oxygenated blood.
Pisces only
The correct option is D:
Explanation of the correct option:
- Fish belong to the phylum Vertebrata's class Pisces, which has only one blood circulation circuit.
- A two-chambered heart with one auricle and one ventricle makes up the heart of a fish.
- The atrium receives deoxygenated blood that returns from body cells via the sinus venosus, and the ventricle, a thick-walled chamber, pumps it to the gills.
- Gills are the sites where gaseous exchange takes place and the blood is oxygenated by dissolved oxygen in the water.
- After that, the oxygenated blood travels to the rest of the bodily cells before returning to the atrium.
Explanation of the incorrect option:
Option A:
The heart of an amphibian has three chambers with one ventricle and two atria that pumps a mixture of oxygenated and deoxygenated blood.
Option B:
Except for the crocodile, amphibians, and reptiles have a three-chambered heart with one ventricle and two atria that pumps a mixture of oxygenated and deoxygenated blood.
Option C:
The heart of an amphibian has three chambers with one ventricle and two atria that pumps a mixture of oxygenated and deoxygenated blood.
Final answer: Fish belong to the phylum Vertebrata's class Pisces in which heart does not pump oxygenated blood.
