World Book Trivia Quiz For Kids--10/15--human Body
Questions and Answers
- 1.
What percentage of the human body is water?
- A.
50%
- B.
65%
- C.
80%
Correct Answer
B. 65%Explanation
Water makes up about 65 percent of the body.Rate this question:
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- 2.
How many organ systems are in the human body?
- A.
5
- B.
7
- C.
10
Correct Answer
C. 10Explanation
Groups of organs form organ systems. Each organ system carries out an important activity in the body. The body has 10 organ systems. They are the: skin; skeletal system; muscular system; digestive system; respiratory system; circulatory system; urinary system; reproductive system; endocrine system; and nervous system.Rate this question:
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- 3.
What is the largest organ in the human body?
- A.
Skin
- B.
Intestines
- C.
Brain
Correct Answer
A. SkinExplanation
The skin is the largest organ of the body.Rate this question:
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- 4.
What is the organ that remove wastes from the blood to flush out of the body called?
- A.
Gallbladder
- B.
Kidney
- C.
Intestine
Correct Answer
B. KidneyExplanation
The urinary system removes wastes from the blood and flushes them out of the body. The chief organs in this system are the two kidneys. Blood flows through the kidneys, and wastes are filtered out.Rate this question:
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- 5.
Digestion begins in the mouth as food is chewed.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The digestive system is made up of various organs. It allows the body to digest, or use, food. Digestion begins in the mouth as food is chewed. After it is swallowed, the food passes through a tube called the esophagus and enters the stomach.Rate this question:
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- 6.
Carbon dioxide is a gas that is produced by the body as a waste.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Human beings cannot live without oxygen. The oxygen enters the bloodstream and is carried throughout the body. The lungs also remove carbon dioxide from the blood. Carbon dioxide is a gas that is produced by the body as a waste.Rate this question:
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- 7.
How fast can the electric signals/messages travel to other body cells from neurons?
- A.
200 mph
- B.
500 mph
- C.
50 mph
Correct Answer
A. 200 mphExplanation
The brain is a jellylike ball, protected by the hard bony case of the skull. It is made of billions of cells called neurons. These cells send messages in the form of tiny electrical signals to other body cells through pathways called nerves. The signals travel at up to 200 miles (322 kilometers) an hour.Rate this question:
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- 8.
How many bones are in the human skeleton?
- A.
119
- B.
206
- C.
302
Correct Answer
B. 206Explanation
A human skeleton has about 206 bones. Sixty bones are in the hands and arms alone.Rate this question:
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- 9.
When you hit your funny bone, the pain and tingling you experience is from hitting the _________.
- A.
Coronary artery
- B.
Mauthner nerve
- C.
Ulnar nerve
Correct Answer
C. Ulnar nerveExplanation
A funny bone is not a bone at all, and it's not funny either. It is an area at the end of your elbow that can be hurt easily. The ulnar nerve lies in this area between the skin and the bone.
The ulnar nerve has no bone or muscle to protect it. So even the smallest blow to this area strikes this nerve and causes a sharp pain and a tingling feeling.Rate this question:
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- 10.
Blood is made up of only blood cells.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Blood has two parts: a liquid called plasma and the blood cells that move around in it.Rate this question:
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Current Version
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Mar 16, 2022Quiz Edited by
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Oct 08, 2012Quiz Created by
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