Answer:
The relationship between frogs and fishes in a pod is predation.
<span>The macrophage is the cell responsible for detecting, engulfing and destroying pathogens and apoptotic cells. These cells process and present antigens (foreign materials) to immunocompetent cells and thus they are the key mediators in the development of all immune reactions.</span>
A. because the heart will pump more blood filled with oxygen to the muscles that need it most
