The answer is body's line of defense. The first line of defense which includes physical as well as chemical barriers would defend the body from infection. It would include the tears, cilia, stomach acid,urine, white blood cells,mucus and the skin. The skin is the largest organ and would act as a barrier from pathogens. If first line of defense won't work the second line will then be activated.
Answer:
having a family history of a certain disease
Explanation:
Turns our food into fuel for the body cells
<span>TRUE! Regular aerobic exercise increases the strength of the heart to pump blood, improves capillary density in muscles and organs and increase the pliability of the blood vessels to move blood. All of this combines to improve VO2 max or the maximal amount of oxygen the body can use during exercise.</span>
