Trivia

Hard

The Hardest Part Of The Human Body Is The?

Tooth Enamel
Sacrum
Xiphoid Process
Temporal Bone
A model of human teeth with the wisdom teeth marked in green.
Gronchih/Wikimedia

Answer: Tooth Enamel

When it comes to hardness in the human body, mineralization is key. Mineralization is the biological process by which an inorganic substance precipitates in an organic matrix—in other words, the way in which our body can build and reinforce organic “scaffolding” with much harder minerals like calcium, thus creating important structures like bones.

Although bones are a perfect and prominent example of mineralization in the human body, they aren’t the hardest and most dense example. For that we turn to teeth, specifically the hard biting surfaces coated in enamel. Tooth enamel is one of the four tissues that make up our teeth and is comprised of 96 percent minerals with the remaining four percent being water and organic materials. The bulk of that mineral content is hydroxyapatite, a crystalline form of calcium phosphate.

On the Mohs hardness scale, healthy tooth enamel ranks at a 5—coincidentally smack in the middle of the mineral hardness scale, making human teeth slightly harder than steel but slightly softer than glass—though we’d strongly recommend against putting your teeth to such an endurance test.

More Trivia Questions

Trivia

Hard

Panspermia Is The Theory That Life Was Deposited On Earth By?

Trivia

Hard

Which Famous Museum’s Founder Had Never Visited The Country It Was Established In?

Trivia

Hard

The Creator Of What Product Was Cremated And Turned Into His Invention Upon Death?

Trivia

Hard

The Colors Of The Rainbow Were Identified And Set As They Are Now By?

Trivia

Hard

Astroturf Derives Its Name From?

Trivia

Hard

Alcohol Sold For Human Consumption In The United States Has Trace Amounts Of?

Trivia

Hard

The Only Planet In Our Solar System With An Indeterminate Number Of Moons Is?

Trivia

Hard

Which Creature Can Be Used To Reliably Detect Pregnancy In Humans?

Trivia

Hard

The Phenomenon Wherein Trying To Hide Information Makes It More Public Is Known As?

Trivia

Hard

What Animal Product Was Once Widely Used To Clarify Beer During Production?