The part of the blood that destroys dead and damaged cells is the white blood cells, specifically a type called phagocytes.

Here's a breakdown:

* White blood cells (WBCs) are the immune system's soldiers, fighting off infections and clearing debris.

* Phagocytes are a type of WBC that engulf and digest foreign invaders like bacteria, viruses, and cellular debris.

* Neutrophils are the most abundant phagocytes and are first responders to infection.

* Macrophages are larger and live longer, cleaning up after infection and removing dead cells.

Here's how it works:

1. Phagocytes detect dead or damaged cells using chemical signals.

2. They move towards the target cells and engulf them.

3. Inside the phagocyte, the cell is broken down by enzymes, eliminating the debris.

This process is crucial for maintaining tissue health and preventing infections.