Answer:
The cardiovascular system helps maintain homeostasis by continually supplying the central nervous system--the brain and spinal cord--with oxygen and glucose. Brain cells start dying after just one minute without oxygen. The brain is the control center for all of the body's homeostatic processes.
Meaning: A dark color or material obtained by heating organic matter or wood.
<span>B. democratic government
Western Germany was heavily backed by UK and United States compared to the communist Eastern Germany.
</span>
Natrual variations i think
