What is micturition? Give abnormal constituents of human urine.

Explanation

### Step-by-Step Solution

**Step 1: Define Micturition**
Micturition is the physiological process of expelling urine from the urinary bladder through the urethra to the outside of the body. It is a vital bodily function that helps in the elimination of waste products and excess substances from the bloodstream.

**Step 2: Identify Abnormal Constituents of Human Urine**
Abnormal constituents in human urine can indicate underlying health issues. Here are four common abnormalities:

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