Laid end to end, an adultβs blood vessels could circle Earthβs equator four times! 
Your mouth produces about one litre of saliva each day! 
Humans have a stage of sleep that features rapid eye movement (REM). REM sleep makes up around 25% of total sleep time and is often when you have your most vivid dreams. 
The brain uses over a quarter of the oxygen used by the human body.
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Infants blink only once or twice a minute while adults average around 10. 
The smallest bone found in the human body is located in the middle ear. The staples (or stirrup) bone is only 2.8 millimetres long.
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Important stage of human reproductionβ¦.
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Pituitary Gland
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Human Brain π§
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Human Nervous System
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#Blood #biologyclasses #nostreducation

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#2 - COMPONENTS OF BLOOD PLASMA π©Έ| Biology Classes
Human Circulatory System
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#biology
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#nostrlearn
#science
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