Human Body Systems & Functions
Test your knowledge about the amazing systems and functions of the human body.
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Quiz Questions & Answers
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Question 1: Which organ in the human body continues to work even when a person is sleeping?
Lungs
Brain
Muscles
Stomach
Question 2: What happens to the human body when it becomes dehydrated?
Blood cells multiply faster
Blood becomes thinner
Blood becomes thicker
Blood pressure always decreases
Question 3: Which system in the human body is responsible for both structural support and blood cell production?
Circulatory system
Lymphatic system
Skeletal system
Muscular system