Fact of Human Anatomy

Fact of Human Anatomy

Human anatomy has many interesting facts. Some of them are listed here.

• The longest and largest bone in the human body is the femur.
• The smallest bone is the stapes in the middle ear. It is thinner than a thread and 0.05 inches (0.127 centimeters) in length.
• Every 12 years, we humans have an entirely new skeleton due to the body’s continual replacement of its bone cells.
• The hardest material in the human body is the Tooth enamel.
• Bones are attached to bones by Ligaments.
• Muscles are attached to bones by connective tissues called Tendons.
• Humans are about 1 cm taller in the morning because the cartilage between the bones gets stretched during sleep.
• The weakest bone in the human body is the spine or spinal cord.
• The strongest muscle is the Masseter muscle, which is located in the jaw.
• The smallest and weakest muscle of the body is the stapedius and is located in the middle ear.
• The largest muscle is the Gluteus Maximus (buttock muscle).
• The longest muscle is the Sartorius in the thigh.
• The largest artery is the aorta.
• The largest vein is the inferior vena cava.
• The smallest blood vessel is the capillary.
• Red blood cells carry oxygen around the body and produce inside the bone marrow. It takes about 20 seconds for a red blood cell to circle the whole body.
• Our heart beats around 100000 times a day, 36500000 times a year and over a billion times if you live beyond 30.
• The blood contains around 10% of the body weight.
• The largest internal organ is the Liver. It is also the heaviest organ, with an average of 1.6 kilograms (3.5 pounds).
• The largest external organ, which is also the largest organ in general, is the Skin.
• The smallest gland is the Pineal gland.
• The largest gland is the Liver.
• The longest cells in the human body are Neurons.
• The largest cell in the human body is Ovum.
• The smallest cell is the Male Sperm, which is one-tenth of the diameter of a human hair.
• Cells related to hair divide remarkably faster than other cells in the body.
• The average lifespan of red blood cells (RBC) is 120 days.
• The water contains 60% of the human body.
• A human´s thumb is as long as his or her Nose.
• Humans sneeze at the rate of about 100 miles per hour, and a cough at about 60 miles per hour.
• Pigment which gives a dark color to the skin is Melanin.
• A human loses about 4 Kilograms of skin cells every year.
• The brain uses over a quarter of the oxygen used by the human body.
• Your brain can store 2.5 million gigabytes of data and process info much faster than the fastest supercomputer.
• A human brain does not feel pain, it has no pain receptors.
• Calcium crystals are a normal part of the Ears.
• The most common element in the human body is Oxygen (65%).
• The most common mineral in the human body is Calcium.
• The most common compound in the human body is Water.
• There are 9,000 – 10.000 taste buds on the tongue. We lose a lot of these taste buds as we age.
• By age of 60, you will have lost half of your test buds.
• The lungs contain over 300,000 million capillaries. If they were laid end to end, they would stretch 2400km.
• The left lung is about 10% smaller than the right one.
• Every drop of blood in the human body is filtered by the body over 300 times a day.
• Adult lungs have a surface area of around 70 square meters.
• Nose and Ears continue growing throughout the entire life. But the size of the eyes remains the same after birth.
• Each person has a unique tongue print just like the fingerprints.
• All babies are color blind when they are born, they only see black & white.
• A baby is born with 300 bones in their body, but as an adult, we have 206 bones.
• 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.
• 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 1.8 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
• Most of the digestion takes place in the Small Intestine.
• There are at least 10 times as many bacteria in the human body as cells.
• The average adult takes over 20,000 breaths a day.

References

1. Human Body Facts: General Knowledge (gkduniya.com)
2. Largest Organ in the Body: Size, Weight & Interesting Facts (healthline.com)
3. The Human Body: Anatomy, Facts & Functions | Live Science
4. Anatomy Trivia: 30+ Questions About The Gross, Coolest, And Craziest Facts About The Human Body by Kidadl