Asked by Anonymous

Which identifies strucrures of the human body in order from least complex to most complex levels of organization?

A. Human heart-circulatory system-artery- blood vessel
B. Nerve cell-brain tissue-brain-nervous system
C. Blood vessel-circulatory system-artery-human heart
D.brain tissue-cell-brain-nervous system

My answer is A. Please help! If I’m wrong please say why and what the answer is. Thanks
Answered by Anonymous
Please help me! I am so confused
Answered by Anonymous
Anyone in here?
Answered by Josue
I cant find the answer!!!!
Answered by Anonymous
Help me someone pleasee!