The study found that Brits do not even know how much blood they have, how many teeth are in their mouths or what roles our vital organs perform.
Many of the 2,000 respondents questioned by researchers were unable to say what the correct body temperature should be, while nearly 10 per cent were unsure of the number of kidneys they have.
The study also found 60 per cent could not name their own blood type, the 'Daily Mail' reported.
"It seems we have a depressing lack of anatomical awareness. Perhaps we have a tendency to rely on medical authorities to do all they can for us without really understanding the way that we work," Jelena Bekvalac, Curator of Human Osteology at the Museum Of London, said.
"We are reassured by expertise and don't take the time to understand the basics of how our own bodies function or are structured," Bekvalac said.
The study found just half of those polled could correctly identify the heart's location in the left-centre of the chest.
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As many as three-quarters of people were stumped when it came to guessing how many bones are in the adult human body.
Nearly half of Brits were unsure as to how many teeth they had, while 40 per cent don't have a clue where their kidney is located.
More than half couldn't tell where their gall bladder can be found and one in thirteen people didn't know how many kidneys they have.
And six in ten didn't know their own blood type.
Only a third of people could correctly state that the average adult has between five and six litres of blood.
Nearly a fifth of Brits, 18 per cent, thought a visor was a type of tooth.
Three-quarters of the respondents did not know that the liver is our biggest internal organ, with four in ten said one of the lungs was of greater size.