The respiratory system always needs iron. The red blood cells are in charge of the transport of O2. They need iron to do this.
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The kidneys contribute to waste management by recycling metabolic products and converting toxic substances into less toxic ones.
Kidneys are an important organ of animals as they provide a channel for the disposal of body waste and simultaneously regulate the balance in the level of salt and water in the body.
Kidneys work as microfilters that are capable of eliminating dissolved and suspended forms of ammonia, uric acid, urea, creatine, creatinine, amino acids, excess salts, and water along with proper disposal of organic waste which altogether constitutes the metabolic waste of the body. These substances before being finally excreted from the boy undergo a last round of reabsorption.
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He casually met the queen of England at a formal ceremony(A)
Water is used in many reactions in the body, both enzymatic and chemical. Water within blood and lymphatic system is responsible for the transport of hormones, antidotes oxygen and nutrients.
Metabolism can be described as entirety of chemical reactions which take place within a cell, the result of which is energy for processes which take place in the body.
Women need 12% of essential fat
