3. Why do valves present in Veens ? Name the veins
that carry oxygenated blood.
Answers
Answer:
Arteries carry oxygenated blood away from the heart. ... Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.)
Explanation:
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Answer:
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. ... 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.
Blood vessels.
The inferior and superior vena cava bring oxygen-poor blood from the body into the right atrium.The pulmonary artery carries oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream.
The pulmonary veins bring oxygen-rich blood to the left atrium.