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#1
Q: How many muscles in the body?
A: About 600.
#2
Q: How many adult teeth?
A: 32.
#3
Q: Smallest bone?
A: The stapes (ear).
#4
Q: Litres of blood in an adult?
A: 4.7–5.5 litres.
#5
Q: Which organ produces insulin?
A: The pancreas.
#6
Q: Length of small intestine?
A: 6–7 metres.
#7
Q: Body water percentage?
A: About 60%.
#8
Q: Which cells detect colour?
A: Cone cells in the retina.
#9
Q: Hardest substance in the body?
A: Tooth enamel.
#10
Q: Human chromosomes?
A: 46 (23 pairs).
#11
Q: Function of white blood cells?
A: Fight infection.
#12
Q: Speed of a nerve impulse?
A: Up to 120 m/s.
#13
Q: Largest internal organ?
A: The liver.
#14
Q: Heartbeats per day?
A: About 100,000.
#15
Q: Where are red blood cells made?
A: Bone marrow.
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