It’s true sir, i have got this question too
A. Tolerance with the drug
Its the same for caffein think about it some people have to drink more to get the same effect because there body’s has developed a tolerance and thats how u get addicted. You have to increase the amount which is addiction.
Liver
Thyroid gland
Spleen
The circulatory system is system in the human body that provides a network through which our blood flows constantly.The human cardiovascular system is considered closed because there are no holes for blood to enter or leave the system. Correct answer: D
In the closed circulatory system the blood stays confined within the vessels and heart.