Question 1

How many bones are in the adult human body?

Accepted Answer

206 bones

Question 2

What is the longest bone in the body?

Accepted Answer

The femur (thigh bone)

Question 3

What is the smallest bone in the body?

Accepted Answer

The stapes (inner ear)

Question 4

How many teeth does an adult have?

Accepted Answer

32 teeth (including wisdom teeth)

Question 5

Which organ pumps blood?

Accepted Answer

The heart

Question 6

How many liters of blood does the heart pump per minute?

Accepted Answer

Approximately 5 liters

Question 7

Which organ filters blood and produces urine?

Accepted Answer

The kidneys

Question 8

What is the largest organ in the human body?

Accepted Answer

The skin

Question 9

Which organ produces insulin?

Accepted Answer

The pancreas

Question 10

How many lungs does a human have?

Accepted Answer

2 lungs

Question 11

What is the role of the liver?

Accepted Answer

Filter blood, produce bile, store glucose

Question 12

How many vertebrae make up the spinal column?

Accepted Answer

33 vertebrae

Question 13

What is the speed of a nerve impulse?

Accepted Answer

Up to 120 m/s

Question 14

How many muscles are in the human body?

Accepted Answer

Approximately 650 muscles

Question 15

Which muscle is used constantly, even at rest?

Accepted Answer

The heart (cardiac muscle)

Question 16

What is blood composed of?

Accepted Answer

Plasma, red blood cells, white blood cells, platelets

Question 17

Which organ controls memory and emotions?

Accepted Answer

The brain (including the hippocampus and amygdala)

Question 18

How many neurons does the brain contain?

Accepted Answer

Approximately 86 billion

Question 19

Which gland regulates metabolism?

Accepted Answer

The thyroid

Question 20

What is the lifespan of a red blood cell?

Accepted Answer

Approximately 120 days

Question 21

Which organ produces red blood cells?

Accepted Answer

Bone marrow

Question 22

What is normal blood pressure?

Accepted Answer

120/80 mmHg

Question 23

Which bone protects the brain?

Accepted Answer

The skull (8 bones)

Question 24

What is the strongest muscle in the body?

Accepted Answer

The masseter (jaw)

Question 25

How many fingers and toes does a human have?

Accepted Answer

20 (10 fingers + 10 toes)

Human Body

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