Etiqueta: Interesting Facts

Education, inspiration, Science

Learning Wednesday: Interesting Facts About The Human Body You Need To Know Part

Dr. Martha Andrea Castro Noriega, MD WMA FACS
  1. The only part of the body that has no blood supply is the cornea of the eye. It receives oxygen directly from the air.
  2. The human brain has a memory capacity equivalent to more than four terabytes on a hard drive.
  3. A newborn child can breathe and swallow at the same time for up to seven months.
  4. Your skull is made up of 29 different bones.
  5. Nerve impulses sent from the brain move at a speed of 274 km/h.
  6. A single human brain generates more electrical impulses in a day than all the telephones of the world combined.
  7. The average human body contains enough sulfur to kill all the fleas on the average dog, enough carbon to make 900 pencils, enough potassium to fire a toy cannon, enough fat to make seven bars of soap, and enough water to fill a 50-liter barrel.
  8. The human heart pumps 182 million liters of blood during the average lifetime.
  9. 50,000 cells in your body died and were replaced by new ones while you were reading this sentence.
  10. The human embryo acquires fingerprints within three months of conception.
interesting facts inspiration education dra martha castro noriega mexico
Information, Science, technology

Detecting Hidden Blood Stains in Crime Scenes like in NYPD BLue show or Real Life Interesting Fact

Dr. Martha Andrea Castro Noriega, MD WMA FACS

All these years watching several TV cop shows, like, NYPD Blue and Law and Order, seeing them grab this fluorescent blue light lamp on a crime scene to show blood stains, well, I just found out this is not true nor accurate in real life crime investigations. It was invented for our amusement only!

It is interesting to learn this fact from a reliable source,  a Criminal Justice Forensic agent retired now: Don Penven

If you watch many of the TV “Cop” shows, you will see at some point those working a crime scene using a blue light in search of invisible blood (blood stains that were cleaned up). Shazam! Blue-white stains appear all over the floors, walls and objects sitting around the crime scene! But in reality—this cannot happen. You see, blood does not fluoresce by applying UV or visible blue light.

Blood, even minute quantities that remain after clean-up, can be made to “luminesce;” that is, by spraying certain chemicals such as Luminol, BlueStar or Fluorescene on the various surfaces, blood will luminesce, or simply “glow in the dark”—and adding blue light is not necessary. So what can alternate light sources reveal? Although blood does not fluoresce, certain other physiological fluids will. UV alternate light sources can reveal the following: seminal fluid, saliva and urine stains. Also, certain narcotics will fluoresce as will bone and teeth fragments.

YOU CAN READ MORE HERE