15. State the functions of arteries and veins. Explain why veins have valves while arteries
do not.
(2 marks)
in plants
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Explanation:
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body.
Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation.
Veins bring back blood to heart from different parts of our body. In order to stop the flow of blood backwards valves are present in veins. Whereas arteries are just to send blood to different parts of our body. The lungs are connected to this system to dissolve oxygen into the blood and remove carbon dioxide from the blood. The heart pumps the blood through the body.
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