Introduction:
The arteries of the human body play an important role in transporting oxygenated blood to the body parts. The direction of oxygenated blood transfer is generally away from the heart and out to body tissues and organs.
Answer to Problem 1RAC
The correct answer is option (b) 3,4,1,2,6,5.
Explanation of Solution
Explanation for the correct answer:
Option (b) 3,4,1,2,6,5. After leaving the heart, oxygenated blood enters elastic arteries. The elastic arteries are composed of various smooth muscle cells. Thus, the oxygenated blood then proceeds through the muscular arteries. The muscular arteries branch out into various smaller arteries. These arteries are referred to as arterioles. The blood travels through the arterioles and then reaches capillaries. The blood gives oxygen to the body tissues in the capillaries. Then the blood enters the venules, and after that, the blood travels through the large veins and at final, reenters the heart. So, the correct answer is option (b).
Explanation for incorrect answer:
Option (a) 3,4,2,1,5,6. The oxygenated blood after leaving the heart enters into elastic arteries and then travels through the muscular arteries and not arterioles. So, this is an incorrect option.
Option (c) 4,3,1,2,5,6. Initially, the oxygenated blood after leaving the heart travels through the elastic arteries and not muscular arteries. So, this is an incorrect option.
Option (d) 4,3,2,1,6,5. After leaving the heart, blood travels through elastic arteries and then enters into muscular arteries. So, this is an incorrect option.
Option (e) 4,2,3,5,1,6. The oxygenated blood initially enters into elastic arteries and then enters into muscular arteries and not capillaries. So, this is an incorrect option.
The direction of blood flow is from the heart to elastic arteries, then muscular arteries, after that enters into arterioles, travels through capillaries, after that enters into venules. The blood reenters the heart after traveling through veins. Hence, the correct answer is option (b) 3,4,1,2,6,5.
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