Answer:
Renal cortex
Explanation:
The renal medulla of a kidney is surrounded by renal cortex. The renal cortex is the granulated layer. It is the renal cortex in which the renal corpuscle (glomerulus and Bowman's capsule) are present. The renal cortex is reddish brown in color. This is due to the fact that most of the renal arteries deliver the blood to the cortex.
As we know, vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body, which is a training for your body so if a real antigen attacks it, it will be trained and kill it with ease. Same thing with the boxer, he is training with dead weight so when he has a boxing match he will be ready and win with ease.
