• Your eyes remain the same size throughout your life
  • Eyes have over 2 million working parts in them 
  • The human eye can differentiate approximately 10 million different colors
  • Brown eyes have blue eyes underneath them below a thin layer of pigment 
  • It is impossible to sneeze with your eyes open


  • Eyebrows serve the important purpose of keeping sweat and dirt out of our eyes
  • On average, we have about 250 eyebrow hairs per eyebrow
  • Eyebrow hair last about 4 months before falling out
  • Eyebrows grow faster in the hotter summer months


  • Without your ears, you would lose your balance
  • Ears are self-cleaning
  • Ears are connected to the nose and throat
  • Having two ears helps us identify which direction sounds are coming from


  • The tongue is made up of 8 muscles
  • A tongue contains between 2,000 and 10,000 taste buds
  • Ears are connected to the nose and throat
  • Having two ears helps us identify which direction sounds are coming from


  • The inside of your mouth contains as many bacteria as there are people on Earth
  • Children have 20 teeth while adults have 32
  • Your enamel is the hardest substance in your body
  • Your smile is as unique as your fingerprint


  • A person’s nose shape is formed by age 10
  • The nose is the first organ of the upper respiratory system
  • The nose cleans the air we breathe
  • Smell plays a key role in taste
  • Your nose shapes the sound of your voice


  • Your lips are 100 times more sensitive than your fingertips
  • Our lips get thinner as we get older
  • Lips can’t sweat


  • There are 24 different muscle in the arm
  • Your arm is made up of three bones: the upper arm bone (humerus) and two forearm bones (the ulna and the radius)


  • Running forms leg muscles faster and better than any other form of exercise since running uses ALL of the leg muscles
  • Upper leg muscles consist of hamstrings, quadriceps and adductors
  • The knee connects the upper leg and lower legs
  • The lower leg consists of five types of muscles -- gastrocnemius, soleus, plantaris, tibialis muscles and peroneus muscles


  • The hands (including the wrists) are the body part with the most bones – Each hand has 27 bones, and together they have 54 bones. That represents over 25% of the total amount of bones in the human body!
  • There are no actual muscles located in your fingers and thumbs
  • Your fingers and thumbs move by the action of almost 40 muscles in your forearm and hand


  • There are 26 bones in a foot. That’s one-quarter of all the bones found in your body
  • By the time a baby reaches the age of one, their feet have grown to almost half their adult size
  • More sensory nerve endings are found in the soles of your feet per square centimeter than any other part of your body