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Class 10ScienceWorld of LivingLife ProcessesExpertLevel 23
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If valves in veins do not work why can blood pooling in legs become more likely?

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Answer and explanation

Correct answer: Blood can flow backward downward under low pressure

Step 1: Blood from legs must return to the heart against gravity. Step 2: Pressure in veins is low. Step 3: If valves fail blood can flow backward and pool.

Related tags

VeinsValvesBlood Pooling

Frequently asked questions

What is the correct answer to this question?

Blood can flow backward downward under low pressure

Why is this the correct answer?

Step 1: Blood from legs must return to the heart against gravity. Step 2: Pressure in veins is low. Step 3: If valves fail blood can flow backward and pool.

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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10 more MCQs
  1. 1What is the main meaning of life processes?
  2. 2What are organisms that make their own food called?
  3. 3What are organisms that depend on other organisms for food called?
  4. 4Which energy do green plants use in the process of making food?
  5. 5Which gas do plants mainly take in during photosynthesis?
  6. 6Which gas do plants release during photosynthesis?
  7. 7What is the green substance in leaves that helps capture light called?
  8. 8What are the tiny pores in leaves through which gases are exchanged called?
  9. 9Which cells control the opening and closing of stomata?
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