Q: 111 (SSC/NA)
question_subject:
Science
question_exam:
SSC
stats:
0,4,13,6,6,1,4
keywords:
{'venous heart': [1, 0, 0, 0], 'fishes': [0, 0, 2, 0], 'amphibians': [1, 0, 0, 1], 'mammals': [2, 0, 2, 2], 'reptilians': [2, 0, 0, 0]}
The correct answer is option 4: Amphibians. Amphibians, such as frogs and salamanders, have venous hearts. Venous hearts are a type of heart that pumps deoxygenated blood to the lungs for oxygenation. In amphibians, the venous heart receives deoxygenated blood from the body and pumps it to the lungs for oxygenation before the oxygenated blood is sent to the rest of the body. This is in contrast to mammals, reptiles, and fishes, which have arterial hearts. Arterial hearts pump oxygenated blood to the body and do not send blood to the lungs for oxygenation. So, while mammals, reptiles, and fishes have arterial hearts, amphibians have venous hearts.