Dialysis fluid contains all the constituents as in plasma except ________.

Explanation

### Step-by-Step Solution:

1. **Understanding Dialysis**: Dialysis is a medical procedure used to remove waste products and excess fluid from the blood when the kidneys are not functioning properly. This is particularly important in conditions like uremia, where there is an accumulation of nitrogenous waste in the blood.

2. **Components of Blood Plasma**: Blood plasma is the liquid component of blood that contains water, electrolytes, proteins, hormones, nutrients, and waste products. It is essential to understand that plasma normally contains nitrogenous wastes such as urea.

3. **Composition of Dialysis Fluid**: During hemodialysis, a dialysis fluid is used that mimics the composition of blood plasma. However, it is specifically designed to facilitate the removal of waste products from the blood.

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