Kidney Function: Removing Excretory Products
The human kidneys are vital organs responsible for filtering waste products from the blood and producing urine. Among the key waste products removed are soluble nitrogen compounds, primarily urea.
Role of Nephrons in Excretion
- The functional units of the kidneys are called nephrons. Each kidney contains millions of nephrons.
- Nephrons are responsible for filtering blood, reabsorbing essential substances, and secreting waste products.
- Soluble nitrogen compounds, such as urea, are filtered from the blood within the nephrons and eventually excreted in urine.
Evaluating Other Options
- Nucleus: This is a part of a cell containing genetic material; it is not involved in kidney excretion.
- Nutrition: This refers to the process of consuming and utilizing food; it is unrelated to the removal of excretory products by the kidneys.
- Mitochondria: These are the powerhouses of the cell, responsible for energy production (ATP synthesis), not waste removal.
Therefore, nephrons are the structures within the kidneys that remove excretory products like soluble nitrogen compounds.
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