How many neurons are in the human brain?
The human brain contains about 86 billion neurons.
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- Why is the left lung smaller?
“The left lung is smaller than the right to make room for the heart.”
Reference: Cleveland Clinic
More from this shelf
How big is the surface area of the lungs?
The inner surface area of the lungs is roughly the size of a tennis court.
What is an "otter tail"?
The Labrador Retriever has a thick, rounded, tapering "otter tail" that works like a rudder, helping the dog steer while it swims.