Add $- 4 + ( - 4 )$

question 45

Short Answer

Add. $- 4 + ( - 4 )$

---

Definitions:

Macrophages

A type of white blood cell that engulfs and digests cellular debris, foreign substances, and pathogens.

Body Defense Mechanism

The biological structures and processes within an organism that protect against disease by identifying and killing pathogens and tumor cells.

Pathogen

An organism such as a bacteria, virus, fungus, or parasite that can cause disease in its host.

Blood Vessels

Hollow structures that facilitate blood movement within the body, covering arteries, veins, and capillaries.