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The red colouring matter of the blood is called?
A. Plasma
B. Haemoglobin
C. Platelets
D. Insulin
Correct Answer Is Option = Haemoglobin
Notes / Explanation
The red colouring matter of the blood is called haemoglobin, and it is a substance found in the red cells of the blood that gives the blood its red colour and that carries out a vital function. The blood is made up of a liquid part and cells of different kinds carried in it, and among these cells are the red blood cells, which are very numerous and which contain the substance haemoglobin. It is the haemoglobin in these red cells that gives the blood its characteristic red colour. The most important function of haemoglobin is the carrying of oxygen around the body. When the blood passes through the lungs, the haemoglobin in the red cells takes up oxygen from the air that has been breathed in, and the blood then carries this oxygen, held by the haemoglobin, to all the parts of the body, where the oxygen is released and delivered to the tissues that need it, for oxygen is essential to the working of the body. In this way the haemoglobin acts as the carrier of oxygen from the lungs to all the parts of the body, which is one of the most vital functions of the blood. Haemoglobin also plays a part in carrying away some of the waste gas produced by the body, taking it to the lungs to be breathed out. Because haemoglobin is so important for carrying oxygen, a lack of enough haemoglobin or of enough red blood cells, a condition known as anaemia, means that the blood cannot carry enough oxygen, which causes tiredness, weakness and other effects. The production of healthy haemoglobin requires certain substances from the diet, including a particular mineral, so that a lack of this mineral in the diet can lead to anaemia. The study of the blood and its components, including haemoglobin, is an important part of the study of the human body. For PPSC and other competitive examinations, the key points to remember are that the red colouring matter of the blood is called haemoglobin, that it is found in the red blood cells and gives the blood its red colour, that its most important function is to carry oxygen from the lungs to all the parts of the body, and that a lack of enough haemoglobin, a condition known as anaemia, means the blood cannot carry enough oxygen and causes tiredness and weakness.
