Question 21 - MCQs from NCERT Exemplar - Chapter 6 Class 10 - Life Processes

Choose the correct statement that describes arteries.

(A) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart

(B) They have thin walls with valves inside, blood flows under low pressure and carry blood away from the heart to various organs of the body

(C) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body

(D) They have thick elastic walls without valves inside, blood flows under high pressure and they carry blood away from the heart to different parts of the body.

Answer

• Arteries are the blood vessels which carry blood away from the heart to different parts of the body .
• The blood flows under high pressure inside the arteries due to which they have thick elastic walls . These prevent the arteries from collapsing .
• They also lack valves (which prevent the backflow of blood) because the blood pressure is so high that it flows in one direction only .

So, the correct answer is (d)