The image shows the path that blood takes through the circulatory system in two vertebrate groups X and Y respectively. Observe the images carefully and identify the correct option.
i. Vertebrate group X is pisces, while group Y is amphibian.
ii. Blood travels only once through the heart in vertebrate group X during one complete circulation.
iii. Organisms belonging to X and Y are cold-blooded.
iv. Vertebrate group Y has organisms with single circulation.
[0.8 Mark]
The image shows the path that blood takes through the circulatory system in two vertebrate groups X and Y respectively. Observe the images carefully and identify the correct option.
i. Vertebrate group X is pisces, while group Y is amphibian.
ii. Blood travels only once through the heart in vertebrate group X during one complete circulation.
iii. Organisms belonging to X and Y are cold-blooded.
iv. Vertebrate group Y has organisms with single circulation.
[0.8 Mark]The correct option is B iii and iv
The vertebrate group X is amphibian, while Y is pisces. Pisces (which includes fishes) have only two chambers in their hearts. The blood is pumped to the gills, is oxygenated there, and passes directly to the rest of the body. Thus, blood goes only once through the heart in the fish during one cycle of passage through the body. So, they have a single circulation. Amphibians, on the other hand, have three-chambered hearts and can tolerate some mixing of the oxygenated and deoxygenated blood streams. Organisms belonging to both the groups are cold-blooded.
The vertebrate group X is amphibian, while Y is pisces. Pisces (which includes fishes) have only two chambers in their hearts. The blood is pumped to the gills, is oxygenated there, and passes directly to the rest of the body. Thus, blood goes only once through the heart in the fish during one cycle of passage through the body. So, they have a single circulation. Amphibians, on the other hand, have three-chambered hearts and can tolerate some mixing of the oxygenated and deoxygenated blood streams. Organisms belonging to both the groups are cold-blooded.
