Plant and animal cells. Cytoplasm. Jelly-like substance, where chemical reactions happen. In plant cells there's a thin lining, whereas in animal cells most of the cell is cytoplasm. Plant and animal cells. Nucleus. Controls what happens inside the cell.Carries genetic information. In exams don't call the nucleus the 'brain' of the cell.ytoplasm. Jelly-like substance, where chemical reactions happen. In plant cells there's a thin lining, whereas in animal cells most of the cell is cytoplasm. Plant and animal cells. Nucleus. Controls what happens inside the cell. Carries genetic information. In exams don't call the nucleus the 'brain' of the cell.
Iron is rarely found in its pure form on the surface of the earth; as it tends to get oxidized when it comes in contact with atmospheric oxygen. For this reason, most of its ores are in the form of iron oxides.
Iron Iron is a trace mineral needed to make hemoglobin, the protein needed to carry oxygen throughout the body. Hemoglobin gives red blood cells their color, and stores most of the body s iron supply.Iron is also stored in muscle tissue, and helps supply the muscles with the oxygen needed to make them contract.Although iron is a trace mineral, it is extremely important, because a deficiency in this nutrient leads to a shortage of red blood cells, a condition known as anemia.Anemic individuals do not have an adequate supply of oxygen in their body, which leaves them tired, pale, and short of breath.ron is also stored in muscle tissue, and helps supply the muscles with the oxygen needed to make them contract. Although iron is a trace mineral, it is extremely important, because a deficiency in this nutrient leads to a shortage of red blood cells, a condition known as anemia.