Question

The number of chambers in the heart of fish is
(a)One
(b)Two
(c)Three
(d)Four

Answer 1

Hint: The fish has an articular and ventricular system of distribution of blood. Instead of lungs, the deoxygenated blood is taken to the gills of fish where the exchange of gases occurs and the oxygenated blood is circulated in the body.

Complete answer:
The number of chambers in the heart of fish is two. Muscular walled hearts with chambers are common characteristics of vertebrates. The deoxygenated blood is pumped into gills, where it gets oxygenated and returns into the heart. This blood is distributed to all body parts by blood.

Additional Information:
 -The heart of the fish generates pumping pressure for the gills on two sides of the body and the circulation in a series since they are connected. In the case of humans, both the left and right sides have dissimilar generation pressure.
-The walls of the gills are very thin in fishes to facilitate the exchange of gases and due to this reason, they cannot withstand high blood pressure.
-Fishes have a circulatory system, which includes both blood and lymph, where the primary circulation system involves blood flowing through the arterial-venous system and the secondary circulation system includes lymph.
So, the correct answer is ‘Two’.

Note: -With body size and brain size difference, fishes have a very small brain compared to its body size.
-Along with the covering of scales around the body, fishes have a later slime-covered around its body for better movement in the water.
-There is a total of 30000 fish species known to human beings in which 1000 of species face extinction now.