Amazing Human Body: *.The largest organ in the body is the skin. *.The liver is the largest gland and the largest internal organ in the human body. *.The brain uses over a quarter of the oxygen used by the human body. *.Our heart beats around 100000 times a day, 36500000 times a year and over a billion times if you live beyond 30. *.Length of thumb is the same with nose. *.Red blood cells carry oxygen around the body. They are created inside the bone marrow. *.It takes about 20 seconds for a red blood cell to circle the whole body. *.The biggest muscle in the body is gluteus maximus, in the buttock. *.The lungs contain over 300,000 million capillaries.If they were laid end to end, they would stretch 2400km. *.Every drop of blood in human body is filtered by the body over 300 times a day. *.The ovum is the largest cell in the human body. *.The smallest is the male sperm cell; it is one-tenth of the diameter of a human hair. *.Adult lungs have a surface area of around 70 square meters. *.The stapes is the smallest bone in the body. It's located in the inner ear. *.The acid in stomach is strong enough to dissolve razor blades. *.Nose and Ears continue growing throughout entire life. *.Each person has a unique tongue print just like the fingerprints. *.The longest muscle in the body is Sartorius. *.The smallest muscle in the body is Stapedius, deep in the ear. It is thinner than a thread and 0.05 inches (0.127 centimeters) in length. *.Enamel is hardest substance in the human body. *.All babies are color blind when they are born, they only see black & white. *.The tongue is the strongest muscle in the human body. *.It takes 17 muscles to smile and 43 to frown. *.The adult body is made up of: 100 trillion cells, 206 bones, 600 muscles, and 22 internal organs. *.Bones in an adult account for 14% of the body's total weight. *.A baby born with 300 bones in their body, but as an adult we have 206 bones. *.200 muscles used to take one step. *.The strongest bone in your body is the femur (thighbone) and it's hollow. It is also the longest and largest bone in Human body. *.The normal pulse is 70 heartbeats per minute. *.Blood is 6 times thicker than water. *.Facial hair grows faster than any other hair on the body. *.Our kidneys filter about 1.3 liters of blood every minute & expel up to 1.4 liters of urine in a day. *.The only part of the body without blood supply is the cornea in the eye. It takes in oxygen directly from the air. *.An average human produces 10,000 gallons of saliva in a lifetime. *.The fastest growing nail is on the middle finger. *.14 bones make up the human face. *.The human heart creates enough pressure while pumping to squirt blood to 30 feet. *.The tooth is the only part of the human body that can’t repair itself.