$A$ portal system in humans is one in which:
- A$A$ vein starts from an organ and ends in the heart.
- B$A$ vein enters an organ other than the heart and breaks up into capillaries.
- CAn artery divides in an organ and starts from the union of capillaries.
- DBlood from the intestine goes to the kidneys and then to the $IVC$.
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The figure shows blood circulation in humans with labels $A$ to $D$. Select the option which gives correct identification of label and functions of the part.
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View SolutionBlood must pass through the ........ to reach the left side of the heart.
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View SolutionWhich of the following options represents the correct pathway of coronary circulation?
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View SolutionMatch Column-$I$ with Column-$II$ and select the correct option.
Column-$I$ Column-$II$ $A$. Fish $(I)$. $3$-chambered heart $B$. Amphibians $(II)$. Incomplete double circulation $C$. Aves $(III)$. $4$-chambered heart $(IV)$. Single circulation $(V)$. $2$-chambered heart $(VI)$. Double circulation
| Column-$I$ | Column-$II$ |
| $A$. Fish | $(I)$. $3$-chambered heart |
| $B$. Amphibians | $(II)$. Incomplete double circulation |
| $C$. Aves | $(III)$. $4$-chambered heart |
| $(IV)$. Single circulation | |
| $(V)$. $2$-chambered heart | |
| $(VI)$. Double circulation |
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View SolutionClosed circulatory system is found in $..........$.
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