<span>The heart contains four chambers: upper left atria, upper right atria, lower left ventricle and the lower right ventricle. Oftentimes, the right atria and right ventricle are together referred to as the "right heart" and the left atria and left ventricle are referred to as the "left heart", however there are still four separate chambers.</span>
Ans. The Adrenal Gland Recieves a message to stop releasing CRH
i think c. is the best answer , we just got off that topic like a week ago .
It is sensors :) i hope this helped you :)
