Circulatory System339 Plays
The circulatory system is one of several systems of the human body that work together to keep a person healthy. The circulatory system circulates or transports blood to and from the heart, and carries oxygen and nutrients to every cell in the body. The circulatory system is connected throughout the body by vessels that transport the blood, oxygen, and nutrients.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.