How much do you know about the human body?

What is the most common blood type?
AB-
B-
O+
How much do fingernails grow per month?
0.75 mm
1.5 mm
3 mm
Where exactly is your heart?
On the left of your chest.
In the middle of your chest.
In the middle of your chest, a bit to the left.
How long are the human intestines?
3.5 m
8.5 m
13.5 m
How many bones do you have when you are born?
206
300
426
How many hairs are there on a human scalp?
90,000-150,000
150,000-190,000
190,000-250,000
What is the human body's biggest organ?
liver
brain
skin
What is the average thickness of human skin?
1-2 mm
2-3 mm
3-4 mm
Where is the largest muscle in your body?
in your bottom
in your thigh
in your jaw
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