Because the job of the white blood cells is to fight infection and diseases - in much the same way as a country sends its army to fight off invaders.
no
the circulatory system does not "produce" blood cells. The circulatory system does not produce anything, it just circulates the blood around your body.
circulatory system
circulatory system
Red blood cells are produced in bone marrow then move into the blood stream which is part of the circulatory system.
Circulatory system
There are billions of white blood cells that are in the circulatory system. A normal white blood count is between 4,500 to 10,000 white blood cells per microliter.
The immune system uses white blood cells but they are produced and are part of the circulatory system.
How does the Skeletal System interact with the Circulatory System?
The circulatory system pumps the blood which carries the nutrients that the cells needs. The circulatory system gets the nutrients from the digestive system.
red blood cells
the blood cells