What is blood coagulation?

Explanation

**Step-by-Step Solution:**

1. **Definition of Blood Coagulation:**
Blood coagulation, commonly known as clotting, is the process by which blood changes from a liquid state to a gel-like form, ultimately resulting in the formation of a blood clot.

2. **Initiation of Coagulation:**
The coagulation process is initiated when there is an injury to a blood vessel. At the site of injury, various cells and platelets are activated and migrate to the affected area.

...