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प्रश्न
You can see some blood vessels on the outside of the hands specially in older people. Are those veins or arteries ? How can you confirm your answer ?
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उत्तर
In older persons the skin becomes loose as the fat below becomes less with age and the vessels passing through these areas especially on the outside of the hands become prominent. These are veins as they flow superficially. The veins are thin and less muscular. These carry the blood to the heart veins are placed superficially so they are easily visible to the eye and are prominent.
The blood in the veins will be carrying CO2 and will have many substances like sugar, amino acids, chemicals and bacteria.
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संबंधित प्रश्न
Arteries and veins are joined by a network of ______.
The blood vessel which carries oxygenated blood from the lungs to the heart is:
Differentiate between the following pair of terms:
Vena cava and aorta.
Give any three differences between an artery and a vein.
Name the Following
The blood vessel leaving the left ventricle of the mammalian heart
Complete the following sentence with appropriate word:
__________ are the blood vessels which usually carry oxygenated blood.
Complete the following sentence with appropriate word:
The blood vessel which transports blood from heart to an organ is called _________.
How a portal vein differs from normal vein?
______ carry blood to an organ and break up into ______ ending in capillaries.
Given alongside are diagrams of a certain category of blood vessels showing the role of a special structure in their walls. Study the figure and answer the questions that follow.
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- Name the kind of blood vessels shown in the figure. What are its branches termed as?
- Name the structure shown inside the blood vessels. Write its important role.
- What kind of blood flows through these blood vessels normally? Name the blood vessel which carries blood from the heart to the lungs.
- Name a similar kind of blood vessel which is related to the liver and kidney.
- Draw a neat and labelled diagram of the transverse section of the blood vessel shown above showing the three layers of its wall and lumen.
