The human body is composed of how many cells?
A. Billions
B. Millions
C. Thousands
D. Quadrillion
Answer:A
The human body is composed of how many cells?
A. Billions B. Millions C. Thousands D. Quadrillion
Explanation: The human body is composed of billions of cells to perform various functions. These cells aggregate to form tissues which in turn aggregate to form organs. Many organs coordinate with each other to form the organ system.