The Human Body

How many bones are in the human body?

• 100

• 103

• 205

• 206

True or False: Adults have less bones than babies do.

• True

• False

Answer explanation

When babies are born, they have many bones (most importantly, in the skull) that fuse together as they get older. The bones in the skull finish fusing at around age 2.

The smallest bones are where in your body?

• In your hand

• In your ear

• In your mouth

• In your back

Answer explanation

The three smallest bones in your body are the hammer (malleus), the anvil (incus), and the stirrup (stapes) which are located within your ear.

What body system is responsible for movement?

• Respiratory

• Nervous

• Muscular

• Digestive

Which of these organs are NOT considered vital (important, cannot live without)?

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• Heart

• Lungs

• Kidney

• All of these are vital

Answer explanation

Humans have 5 vital organs: the heart, the lungs, the kidneys, the liver, and the brain.

What is the largest organ in the body?

• Skin

• Liver

• Small Intestine

• Large Intestine

Answer explanation

Though the liver is the largest organ that insider your body, the skin is the largest organ covering the outside of your body.

Which of these is NOT involved in eating and breaking down food?

• Mouth

• Trachea

• Esophagus

• Stomach

Answer explanation

Your mouth chews your food, your esophagus allows your food to travel to your stomach, which further breaks down the food.

On the other hand, the trachea, also called your windpipe, brings air to your lungs.