You will find the answers to... QUESTIONS 3,4,5,6,7 and 8A n the information below. You will find the answers to... QUESTIONS 3,4,5,6,7 and 8A n the information below. The Brain Is The Most Complex Organ In The Human Body • Your brain weighs about 3 pounds. • Your brain uses 20-30% of the body's energy (this means it uses about 20-30% of the calories you eat). • There are about 100 billion neurons in the brain. Neurons are special nerve cells that send and receive messages. • Each neuron or nerve cell is connected to other nerve cells in the brain, by sometimes hundreds or even thousands of connections. • It is estimated that there are over 1,000,000,000,000,000 (that's 1 quadrillion) connections in the brain, more connections than there are stars in universe • The brain is more complicated than any computer we can imagine. The world's most sophisticated computer is currently only as complicated as a rat's brain. The Brain Is Fragile • Your brain is very soft. It is the consistency of soft butter or a raw egg. • Always wear your helmet when you're doing an activity where you might injure your brain. Riding your bike, skateboarding, playing tackle football, ice hockey and any other activities where you are at risk for getting a hard knock on the head. • WEAR YOUR SEATBELT- many brain injuries occur in car accidents. Your seatbelt can protrect your entire body including your brain. BACK PLAY AGAIN NEXT