If veins had no valves, what problem would be most likely?
Answer and explanation
Correct answer: Backflow of blood
The governing concept is one-way movement of blood in veins. Venous blood returns to the heart at relatively low pressure, and body movements help push it upward, especially from the legs. Valves open toward the heart and close when blood tends to move backward. Without these valves, gravity and low pressure could permit backflow and pooling of blood. Therefore option A is correct; the other choices involve unrelated organs or plant tissue.
Frequently asked questions
What is the correct answer to this question?
Backflow of blood
Why is this the correct answer?
The governing concept is one-way movement of blood in veins. Venous blood returns to the heart at relatively low pressure, and body movements help push it upward, especially from the legs. Valves open toward the heart and close when blood tends to move backward. Without these valves, gravity and low pressure could permit backflow and pooling of blood. Therefore option A is correct; the other choices involve unrelated organs or plant tissue.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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