Aorta Artery
on what body of water begins north of Sacramento
The immune system is a system in the body. It begins with the letter i.
Xiphoid process is a body part. It begins with the letter x.
Your digestive system begins with D.
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The body parts that I know of are the quadriceps.
Arm, ankle
the waist.
hypothalmus
Organs
The question doesn't make sense, but the body raises its' temperature ( fever) to help kill off any foreign pathogens that are attacking the body.
Your major body systems stop functioning and your body begins to decompose.