Q.33. (a) Define excretion Name any two substances that are selectively reabsorbed.
() Draw and label the following parts in the human excretory system.
Right kidney (1) Urinary Bladder (in) Right renal artery
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What are kidneys? The kidneys are two bean-shaped organs in the renal system. They help the body pass waste as urine. They also help filter blood before sending it back to the heart.
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a. The biological process involved in the removal of the harmful metabolic wastes from the body is called excretion. Many substances like Sodium, Potassium ions, glucose, amino acids, vitamins and hormones are selectively reabsorbed during urine formation.
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