| स्तंभ-$I$ | स्तंभ-$II$ |
| $A$. मत्स्य | $(i)$. तीन-कोष्ठीय हृदय |
| $B$. उभयचर | $(ii)$. अपूर्ण दोहरा परिसंचरण |
| $C$. पक्षी | $(iii)$. चार-कोष्ठीय हृदय |
| $(iv)$. एकल परिसंचरण | |
| $(v)$. दो-कोष्ठीय हृदय | |
| $(vi)$. दोहरा परिसंचरण |
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