D. Ecstasy. MDMA is the pure form of ecstasy.
B TODDLER hood this helps
Mucous membrane exposure
Hope this helps!
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.
