The heart beats roughly 100,000 times per day at rest.
Question 2 / 10
Where does most digestion and nutrient absorption occur?
1
Stomach
2
Small intestine
3
Large intestine
4
Esophagus
Villi in the small intestine increase surface area for absorption.
Question 3 / 10
Which blood cells help fight infection?
1
Red blood cells
2
White blood cells
3
Platelets
4
Plasma only
White blood cells are part of the immune response.
Question 4 / 10
The human body has how many lungs?
1
One
2
Two
3
Three
4
Four
Lungs exchange oxygen and carbon dioxide in alveoli.
Question 5 / 10
Which bone protects the brain?
1
Femur
2
Skull
3
Ribcage
4
Pelvis
The cranium shields the brain from mechanical injury.
Question 6 / 10
Insulin is produced by which organ?
1
Pancreas
2
Spleen
3
Gallbladder
4
Thyroid
Pancreatic beta cells regulate blood glucose via insulin.
Question 7 / 10
Which system includes bones and joints?
1
Muscular
2
Skeletal
3
Nervous
4
Endocrine
Adults have 206 bones supporting movement and protecting organs.
Question 8 / 10
What is the largest organ of the human body?
1
Liver
2
Skin
3
Brain
4
Lungs
Skin provides barrier protection and temperature regulation.
Question 9 / 10
Neurons are cells of which system?
1
Digestive
2
Nervous
3
Circulatory
4
Lymphatic
The brain contains roughly 86 billion neurons (modern estimates).
Question 10 / 10
Which mineral is primary for bone strength?
1
Iron
2
Calcium
3
Sodium
4
Potassium
Calcium and vitamin D support bone density throughout life.
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Learn more: Human Body Facts Quiz
Anatomy quizzes should reinforce credible health literacy. The National Institutes of Health publishes plain-language guides on body systems and disease prevention.
Organs work as systems: cardiovascular, respiratory, digestive, nervous, and musculoskeletal networks interact constantly. Misconceptions — like "we only use 10% of our brain" — are debunked by neuroscience summaries from NIMH.
