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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
The blood from the heart is transported to all parts of the body by the ______.
Aqueous humour, Vitreous humour, lris, Central canal
The vein that carries oxygenated blood.
The diagram below represents the human heart in one phase of its function. Study the diagram carefully and answer the questions that follow:
(i) Name the phase.
(ii) Which part of the heart is contracting in this phase? Give a reason to support your answer.
(iii) Name the parts labelled 1 to 4.
(iv) What type of blood flows through ‘2’?
(v) State the function of the part numbered ‘5’.
(vi) Name the membrane that covers the heart.
Differentiate between members of the following pairs with reference to the aspect asked within bracket:
Tricuspid and bicuspid values (location)
Explain the following:
Why is the closed circulatory system more efficient than the open system?
Choose the correct answer:
English physician who discovered blood circulation was ___________
Draw the structure of human heart and label its parts
Write a short note on the human heart.
A resting person usually has a pulse rate between 72 to 80 beats per minute.
