B3U2 Human Body Tour

Who is Bob?

• an antman

• Human body tour guide.

• a superhero

• An explorer

What part of the body do we enter when the man yawns?

• Nose

• Ear

• Throat

• Mouth

What happens to the brain when we yawn?

• Yawning decreases brain activity and makes us sleepy.

• Yawning increases heart rate and raises body temperature.

• Yawning helps increase oxygen supply and cools the brain.

• Yawning is a sign of boredom and has no physiological effect.

How many bacteria can be found on each tooth in an unclean mouth?

• 100 million to 1 billion

• 1 trillion to 10 trillion

• 1 to 10 million

• 10,000 to 100,000

What does the beating sound we hear represent in the human body?

• The sound of breathing.

• The heartbeat.

• The sound of digestion.

• The sound of blood flow.

What is the average number of times the heart beats in a day?

• 115200 beats

• 144000 beats

• 86400 beats

• 100000 beats

What is the approximate size of a human heart?

• Roughly the size of a small apple, about 8 cm in length.

• Similar to a large orange, approximately 15 cm in length.

• About the size of a grapefruit, around 20 cm in length.

• Approximately the size of a fist, around 12 cm in length.

How does the number of bacteria in some mouths compare to the world’s population?

• The number of bacteria in some mouths is less than the world’s population.

• The world’s population is greater than the total number of bacteria on Earth.

• There are no bacteria in human mouths.

• The number of bacteria in some mouths can exceed the world’s population.