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प्रश्न
Why is the separation of the right side and the left side of the heart useful? How does it help birds and mammals?
उत्तर
The separation of the right side and the left side of the heart is useful to keep oxygenated and deoxygenated blood from mixing. Such separation allows a highly efficient supply of oxygen to the body. This is useful in animals that have high energy needs, such as birds and mammals, which constantly use energy to maintain their body temperature. In animals that do not use energy for this purpose, the body temperature depends on the temperature in the environment. Such animals, like amphibians or many reptiles have three-chambered hearts, and tolerate some mixing of the oxygenated and de-oxygenated blood streams.
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संबंधित प्रश्न
What is the significance of double circulation?
The diagram represents the ‘closed system’ or ‘double circulation’ of blood in mammals.
Justify the above statement.
State two structural and two functional differences between the arteries and veins.
State the changes in the composition of blood as it passes through the following organs:
(a) Lungs (b) Gut (c) Liver (d) Kidneys.
In the given diagram, 'X' indicates ______
What is the significance of hepatic portal system in the circulatory system?
Give scientific reason.
Closed circulation is more efficient than open circulation.
Write a note on closed circulation.
From where to where do the following blood vessel carry blood?
Hepatic vein
The blood vessel which carries blood from the stomach and intestine to the liver:
Distinguish between the following pair on the basis of words indicated in the bracket ( ):
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