Defence means protect and offence means fight back
<span>B is the closest answer. When an immune response is triggered, phagocytes are induced and they go to the site of the invasion by the foreign body. These then digest and destroy the bacteria that triggered the response. Other cells are also activated at this point to assist with the immune response.</span>
Cardiovascular system is often compared to a city.
The median age of onset for bipolar disorder is 25 years (National Institue of Mental Health), although the illness can start in early childhood or as late as the 40's and 50's. An equal number of men and women develop bipolar illness and it is found in all ages, races, ethnic groups and social classes.