why are RBCs destroyed by liver after 120 days

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Solution

RBC's are destroyed by the liver after 120 days because cells get old (aged) and undergoes changes in its plasma membrane making it susceptible to selective recognition by macrophages and subsequent phagocytosis in the spleen, liver and lymph nodes.

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The life span of RBCs is about 120 days after which they are destroyed in the

Statement 1: Bile pigment is formed in the liver by the breakdown of haemoglobin in dead RBCs.

Statement 2: Vitamins are not excreted along with urine.

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