论文部分内容阅读
铁是人体中含量最丰富的微量元素,正常成人体内含铁4～5克,约占体重的十万分之四。人体中的铁60％～70％存在于血液中,3％～10％存在于肌肉中,12％～24％存在于肝、脾和骨髓中,1％存在于细胞色素氧化酶、过氧化物酶、过氧化氢酶等酶系统中。铁在体内的生理功用主要作为血红蛋白、肌红蛋白、细胞色素等的组成部分,参与体内氧的运送和组织呼吸过程。 参加体内代谢的铁有二种来源,一是食物中的铁;另一种是红细胞衰老解体后,释放的血红蛋白中的铁,这一部分铁可反复利用,消耗是很少的。成人男性每天损耗约为0.5～1.0毫克;生育年龄妇女铁的损耗比男性大,妇女在月经周期中每天损耗约为1.4～2.0毫克,在怀孕及哺乳期间的铁损耗更
Iron is the most abundant trace elements in the human body, normal adults with iron 4 to 5 grams, accounting for about four hundred thousandths of the weight. 60% to 70% of the body’s iron is present in the blood, 3% to 10% in the muscle, 12% to 24% in the liver, spleen and bone marrow, and 1% in the cytochrome oxidase, peroxide Enzymes, catalases and other enzyme systems. The physiological functions of iron in the body mainly as part of hemoglobin, myoglobin, cytochromes, etc., involved in oxygen transport and tissue respiration process. There are two sources of iron metabolism in the body, one is the iron in the food, and the other is the iron in hemoglobin released after the aging of red blood cells disintegrates. This part of iron can be reused and the consumption is very little. Adult male daily loss of about 0.5 to 1.0 mg; iron loss in women of childbearing age than men, women in the menstrual cycle loss of about 1.4 to 2.0 mg per day during pregnancy and breastfeeding iron loss more