What's The Purpose of The Tiny Hairs Called Cilia In Your Airways? Produce oxygen Move mucus and trapped particles Control your voice Absorb vitamins Did You Know! Some bone disorders…

What Gives Your Skin Its Fingerprints? Random surface scratches Friction ridges Blood vessels Sweat Did You Know! Kidney problems can cause itching even without a skin disease. People with advanced…

Which Sense Is Particularly Closely Connected With Memory and Emotion? Smell Touch Balance Temperature Did You Know! Some kidney disorders can affect hearing. Certain inherited conditions, such as Alport syndrome,…

Approximately How Fast Can A Sneeze Travel? Less than 1 mph Several to tens of miles per hour Exactly 100 mph every time Faster than the speed of sound Did…

Which Substance Gives Red Blood Cells Much of Their Red Color? Keratin Collagen Hemoglobin Melatonin Did You Know! Vitamin C deficiency can start with subtle symptoms long before scurvy develops….

What's One Reason Your Nose Can Become Stuffy When You Cry? Your lungs produce mucus Tears drain into the nasal cavity Your tongue swells Your ears release fluid Did You…

Which Human Body Part Continues Changing Noticeably Throughout Adulthood? Ears Teeth Elbows Kneecaps Did You Know! Vitamin B12 deficiency can mimic neurological disease. Low B12 can cause numbness, tingling, balance…

Which Organ Can Regenerate A Significant Amount of Its Lost Tissue? Heart Liver Bladder Thyroid Did You Know! A rare disorder can make people sleep for days at a time….

Which Muscle Is Primarily Responsible For Helping You Breathe? Biceps Hamstring Trapezius Diaphragm Did You Know! Sleep paralysis can include vivid hallucinations. A person may wake up mentally alert but…