Topics: Cells, Tissues and Organs Quiz
An organ system is:
A. a collection of organs working together to do an important job
B. a collection of tissues that do the same job
C. a collection of tissues that do different jobs
D. a way of counting the number of organs in the body
Select your answer:

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Circulatory System › View___ are tiny blood vessels that carry blood to an from almost all body cells and connect arteries and veins.
A. arteries
B. veins
C. capillaries
Nutrition › View
99% is found in bones and teeth
A. Vitamin D
B. protein
C. calcium
D. Vitamin C