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प्रश्न
What are the components of blood?
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उत्तर १
- The main components of blood are -
- plasma
- blood cells (Red blood corpuscles):
- Plasma is the fluid part of blood in which the blood cells are suspended. The plasma contains water, minerals, nutrients, proteins, etc.
- Blood cells are of three types -
- RBCs (Red blood cells),
- WBCs (White blood cells)
- blood platelets.
उत्तर २
There are four components of blood:
- Plasma is a liquid part of blood which is yellowish in colour and contains 90% water. It contains food, enzymes, wastes proteins etc.
- Red blood cells are disc-shaped cells containing red-coloured pigment called haemoglobin in it. Haemoglobin helps in the transportation of oxygen.
- White blood cells are the fighting cells which protect us against bacteria and foreign materials causing infections.
- Platelets help in clotting of the blood.
संबंधित प्रश्न
| The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body. |
- What is (i) tissue A (ii) pigment B, and (iii) colour C?
- Name (i) D (ii) E (iii) F, and (iv) G.
- Name one substance (other than oxygen) which is transported by tissue A in the human body.
- Which two components of tissue A are the cells without nucleus?
- Name any two organisms ( animals) which do not have liquid like A in their body.
Name the following:
Components of blood
State the Function: Vitamin K
A patient with blood group O was injured in an accident and has blood loss. Which group of blood should be used by the doctor for transfusion?
All veins carry deoxygenated blood.
What is the shape of RBC in human blood?
Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention its functions.
Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
The volume of blood in human adults is ______.
______ are produced in the bone marrow.
What prevents the backflow of blood inside the heart during contraction?
The blood leaving the tissues becomes richer in
Veins have valves that allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?
What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart?
Name the only artery that carries carbon dioxide-rich blood.
Why is it called an artery if it does not carry oxygen-rich blood?
While learning to ride a bicycle Boojho lost his balance and fell. He got bruises on his knees and it started bleeding. However, the bleeding stopped after some time.
- Why did the bleeding stop?
- What would be the colour of the wounded area and why?
- Which type of blood cells are responsible for clotting of blood?
When a red blood corpuscle containing both A and B antigens are mixed with your blood serum, they agglutinate. Hence your blood group is ______.
