Which one of the following body function is not performed by kidneys `:-`

Options

A. Excretion
B. Osmoregulation
C. Regulation of blood volume
D. Destruction of dead blood corpuscles

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which body function is not performed by the kidneys. We have four options to consider: excretion, osmoregulation, regulation of blood volume, and destruction of dead blood carcass cells.

2. **Analyzing Each Option**:
- **Excretion**: The kidneys are primarily known for their role in excretion. They filter waste products from the blood and excrete them in urine. Therefore, this function is performed by the kidneys.

- **Osmoregulation**: The kidneys also play a crucial role in osmoregulation, which involves maintaining the balance of water and electrolytes in the body. This function is indeed performed by the kidneys.

- **Regulation of Blood Volume**: The kidneys help regulate blood volume by adjusting the amount of water reabsorbed into the bloodstream. This is influenced by hormones such as ADH (anti-diuretic hormone). Thus, this function is also performed by the kidneys.

- **Destruction of Dead Blood Carcass Cells**: This function is not performed by the kidneys. The destruction of dead blood cells is primarily carried out by the spleen, which filters and recycles blood components.

3. **Conclusion**: After analyzing all the options, we can conclude that the function that is not performed by the kidneys is the destruction of dead blood carcass cells. Therefore, the correct answer is option D.

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