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Portal Circulation

Assertion :In...

Question

Assertion :In fishes, heart is venous Reason: Only veins are present in the heart of fishes

A

If both the assertion and the reason are true and the reason
is a correct explanation of the assertion

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B

If both the assertion and reason are true but the reason is
not a correct explanation of the assertion

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C

If the assertion is true but the reason is false

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D

If both the assertion and reason are false

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Solution

The correct option is C If the assertion is true but the reason is false
The correct option is C.
The circulatory system of fishes is responsible for transporting blood and nutrients throughout the body. It has a closed circulatory system, i.e. blood travels across the body through the network of blood vessels. Fish heart carry only deoxygenated blood that is why it is called as Venous heart.
Fish's heart is called as 'venous heart' because heart receives blood from veins and send it to the gills for oxygenation.

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