Name some abnormal constituents of urine.

Explanation

### Step-by-Step Solution:

1. **Understanding Abnormal Constituents**: Abnormal constituents in urine refer to substances that are not typically present in urine under normal physiological conditions. Their presence can indicate underlying health issues.

2. **Identifying Abnormal Constituents**:
- **Glucose (Sugar)**: The presence of glucose in urine, known as glucosuria, often indicates diabetes mellitus, where the body cannot properly utilize glucose.
- **Proteins**: The presence of proteins in urine, termed proteinuria, can suggest kidney damage or disease, as healthy kidneys typically do not allow significant amounts of protein to pass into urine.
- **Blood**: Hematuria refers to the presence of blood in urine, which can indicate various conditions, including urinary tract infections, kidney stones, or renal failure.
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