Arteries and Veins
Arteries and Veins
Arteries carry oxygen rich blood from heart to all parts of the body. Blood flows through the arteries have thick, elastic walls. The arteries branch out into smaller tubes known as capillaries when they enter the organs.
Veins carry the oxygen deficient and carbon dioxide rich blood back to the heart. Veins have thinner walls than arteries since blood flows at a lower pressure. Veins have valves that prevent backflow of blood flows at a lower pressure. Veins have valves that prevent backflow of blood, so blood flows in one direction, that is, towards the heart.
Capillaries are thin walled blood vessels and form a network of extremely tiny blood vessels between arteries and veins. The walls of the capillaries are so thin that diffusion of gases and chemical substances takes place very easily.
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Arteries |
Veins |
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1. They carry blood away from the heart. |
They carry blood to the heart. |
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2. They are thick walled tubes. |
They have thinner walls. |
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3. They are deeply placed under the skin, and blood moves under high pressure. |
They are superficially placed and blood does not move under pressure. |
Which of the following are correct ? (a) Arteries are wide, elastic and thick walled vessels as they carry blood away from the heart to the limbs and organs of the body. (b) Veins have valves that allow blood to flow in one direction only. (c) The walls of the capillaries are so thin that diffusion of gases and chemical substances takes place very easily. | |||
| Right Option : D | |||
| View Explanation | |||
The vessels that carry blood away from the heart are called __________________ . | |||
| Right Option : A | |||
| View Explanation | |||
The impure, deoxygenated blood, rich in waste materials is carried by the ________________ | |||
| Right Option : C | |||
| View Explanation | |||
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Third consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
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8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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