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ScienceEasy
Biology
Human Body
Which part of the tooth is the hardest substance in the human body?
ScienceEasy
Biology
Human Body
Which nutrient is the primary source of energy for the brain?
ScienceMedium
Biology
Human Body
Which valves prevent the backflow of blood from the ventricles into the atria?
ScienceMedium
Biology
Human Body
In which part of the small intestine does most of the chemical digestion occur?
ScienceMedium
Biology
Human Body
What process involves the movement of air into and out of the lungs?
ScienceMedium
Biology
Human Body
Which part of the nephron is responsible for the filtration of blood?
ScienceMedium
Biology
Human Body
Which cranial nerve is responsible for the sense of smell?
ScienceMedium
Biology
Human Body
Which hormone is secreted by the adrenal medulla during stress?