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320

What is the fastest marine mammal?

The common dolphin, reaching speeds of 60 km/h or 37 mph

320

How many bones are in the average human body?

206

320

True or False: Your body's temperature rises slightly during digestion.

 True!

320

What is the largest rodent in the world?

The capybara

320

True or False: Most of the dust in your home is made of human skin. 

False (although you can find this "fact" in a lot of places). Dust is made up of lots of different things including animal dander, insect waste, and dirt.

640

What type of blood cells fight infections and diseases?

White blood cells

640

Which mammal sleeps the most?

Koalas 

640

What is the longest-living land mammal?

Humans

640

Which organ has four chambers?

The heart

640

Which is the rarest blood type in humans?

AB negative. Less than one percent of the population has this blood type.

960

How many times does the heartbeat per day?

About 100,000

960

After what age do babies start shedding tears?

One month

960

Which mammal has fingerprints almost identical to humans?

Koala 

960

Where on your body is your skin the thinnest?

Eyelid

960

What does SARS stand for?

Severe Acute Respiratory Syndrome

1280

Which bone are babies born without?

Knee cap

1280

What is the average lifespan of a human red blood cell?

Around 120 days.

1280

What organ produces Insulin?  

Pancreas

1280

What is the only mammal born with horns?

The giraffe, though the horns are soft at birth

1280

What is the loudest mammal?

The sperm whale, capable of making sounds up to 230 decibels!

1550

What mammal has the strongest bite force?

The hippopotamus, with over 1,800 PSI

1550

What kind of cells are found in the brain?

Neurons

1550

What mammal has the largest brain?

The sperm whale

1550

What part of the brain is responsible for regulating basic bodily functions like heartbeat and breathing?

Medulla Oblongata

1550

How long can a sloth hold its breath underwater?

Up to 40 minutes