Trivia

Hard

What Creature On Earth Has The Highest Blood Pressure?

Giraffes
Hummingbirds
Blue Whales
Humans

Answer: Giraffes

Giraffes have the highest known blood pressure of any creature on earth for a very good reason: their hearts are fighting gravity every step of the way. Just like we use pumps to transport water up to the top of lofty water towers, giraffes require a strong heart and high blood pressure to push blood all the way up the lengthy neck that is a significant part of their 14.1–18.7 feet high bodies.

How high is their blood pressure? While a human being in good health and with average blood pressure has a blood pressure of around 120/80 mm Hg, giraffes maintain blood pressures that are at least approximately twice that of humans and it can skyrocket much higher when the animal is running or otherwise exerting itself.

Don’t worry though, giraffes have evolved to sustain the significantly higher blood pressure. Not only are the walls of their hearts incredibly thick and muscular (much like we design the walls of a boiler to withstand higher pressure), but giraffes have a mechanism for selectively expanding and contracting blood vessels to control and route blood through their body to regulate local pressure.

Trivia

Hard

The Largest City Not Located On A Lake, River, Or Coastline Is?

Trivia

Hard

To Halt An Editing War, Wikipedia Had To Ban All IP Addresses Belonging To?

Trivia

Easy

Which Common Christmas Decoration Is Actually A Parasite?

Trivia

Hard

Undersea Communication Cables Are Buried To Protect Them From?

Trivia

Hard

In A Blind Taste Test, Spoons Of Which Metal Type Made Food Taste Best?

Trivia

Very Hard

19th Century Abolitionists Used Which Of The Following For Baking As A Form Of Political Protest?

Trivia

Hard

The Country With The Highest Number Of 7-Eleven Stores Is?

Trivia

Hard

Which Of These U.S. States’ Official Mammal Is Extinct?

Trivia

Hard

The Only Mobile National Landmark In The United States Is Located Where?

Trivia

Hard

The Oldest Company Logo In Continuous Use Belongs To?