The answer is develop skills
-the burning of fossil fuel
-natural events
-waste in landfills
-agricultural activities
-mining operations
-etc
Answer:
The doctor may count ones white blood cells to see if there is an infection or injury present.
Explanation:
White blood cells are a type of cells that promote health and healing. So, if there is a higher amount than usual this could indicate a possible infection or sickness.
The heart is the system's pump and the blood vessels are like the delivery routes and it is a muscle. The pumps are the beat. The heart is a muscle about the size of a fist and it is the muscle in the body that works the hardest. The statement that the heart muscle rests only between beats is true