Anemia often develops slowly. The patient may unknowingly reduce his physical activity, Lowered hemoglobin results in decreased ability to carry oxygen to the cells/ and to return carbon dioxide to the lungs for exhalation.
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There are normally around 5000000 red blood cells in a drop of blood no longer than the head of a pin. These tiny cells are rounded on the edges and hollow in middle, something like a disk or a plate.
Iron is the chief among the trace elements required for the body. The total content of iron is very small in the body. In an adult it is approximately 3 to 5 gm.
Iron is a very important nutrient. The adult human body contains 3 to 4 grams of iron Of this 50 to 70 per cent is present in hemoglobin of blood. F-ach gram of hemoglobin contains 3 to 3.4.
Iron is the chief among the trace elements required for the body. The total content of iron is very small in the body about 3 to 5 grams in adults.
Modern civilization has developed with the invention of wheel and all the tools are being made out of iron. All the machines, things of daily use in our lives like fans, car, scooter, chair, etc. are made with iron.
Iron and steel industries are heavy industries using very bulky raw materials. Therefore, its location is governed by close proximity to raw materials and good transport system.
Stones were the main tools and weapons of early human beings. This was the Stone Age. Better tools were developed to meet the increasing needs of the people. Strong tools and weapons were made only after the discovery of metals.
Some of the most effective ways to prevent iron from rusting are : 1. Barrier protection 2. Sacrificial protection. In sacrificial method, surface of iron is covered with layer of more active metal like zinc. This active metal loses electrons (undergoes oxidation) in preference to iron and hence, prevents the rusting of iron.
Some of the most important physical properties of Iron are : 1. Pure iron greyish white in color 2. Pure iron greyish white in color 3. 4. It is highly malleable and ductile. 4. It is ferromagnetic, that is, it becomes strongly magnetised when placed in a magnetic field.