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, not all cells in the circulatory system are blood cells. The circulatory system also includes blood vessels like arteries, veins, and capillaries that transport blood throughout the body. Blood cells are a component of the blood itself, along with plasma.
circulatory system
circulatory system
No, the circulatory system does not produce red and white blood cells. Red blood cells are produced in the bone marrow, while white blood cells are produced in various tissues in the body such as the bone marrow and lymph nodes. The circulatory system is responsible for transporting these cells around the body.
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.
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
Frog Red Blood Cells and Human Red Blood Cells
The circulatory system, consisting of the heart, blood vessels, and blood, is responsible for delivering oxygen and nutrients to cells throughout the body. Oxygen and nutrients are transported in the blood and carried to tissues where they are needed for cellular function.