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Questions
Why is the colour of the blood-red?
Why is blood red?
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Solution
Blood is red because it contains haemoglobin, a red-coloured pigment present in red blood cells that carries oxygen.
RELATED QUESTIONS
What are the components of blood?
| 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.
Which is the correct sequence of blood flow?
Match the following.
| 1. Leukaemia | (a) Thrombocytes |
| 2. Platelets | (b) Phagocyte |
| 3. Monocytes | (c) Decrease in leucocytes |
| 4. Leucopenia | (d) Blood Cancer |
| 5. AB blood group | (e) Allergic condition |
| 6. O blood group | (f) Inflammation |
| 7. Eosinophil | (g) Absence of antigen |
| 8. Neutrophils | (h) Absence of antibody |
Who discovered the Rh factor? Why was it named so?
Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention its functions.
Crab has blue blood.
Blood is a fluid connective tissue.
Single circulation i.e. blood flows through the heart only once during one cycle of passage through the body, is exhibited by
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?
