Advertisements
Advertisements
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?
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.
APPEARS IN
संबंधित प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow :
(i) Which parts of heart are in the diastolic phase? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.
Describe, in brief, the circulatory system in human beings.
Name the following:
The blood vessels which start from capillaries and end in capillaries.
Choose the correct answer:
English physician who discovered blood circulation was ___________
Define the Circulatory system.
How many litres of blood does an adult human body have?
Describe how the exchange of oxygen and carbon dioxide gases takes place in the lungs.
Thin tube-like structures which are the component of circulatory system are called blood vessels.
The lymphatic system consists of which of the following?
In which of the following process blood neutrophils play an important role?
