BREATHING IS AUTOMATIC! YOU DON’T EVEN THINK ABOUT IT. YOUR BODY KNOWS WHEN TO INHALE AND EXHALE. LUNGS LIKE BALLOONS! WHEN YOU BREATHE IN, THEY FILL UP WITH AIR, AND WHEN YOU BREATHE OUT, THEY DEFLATE LIKE BALLOONS. EXERCISE MAKES YOUR HEART BEAT FASTER: WHEN YOU RUN OR PLAY SPORTS, YOUR BODY NEEDS MORE OXYGEN. THAT'S WHY YOUR HEART BEATS FASTER TO PUMP MORE BLOOD AND OXYGEN TO YOUR MUSCLES. BREATHING CAN BE CALMING: TAKING SLOW, DEEP BREATHS CAN HELP YOU FEEL CALM AND RELAXED. HICCUPS HAPPEN WHEN YOUR DIAPHRAGM SUDDENLY CONTRACTS. SOMETIMES, IT CAN BE BECAUSE YOU ATE OR DRANK TOO FAST OR GOT EXCITED. BREATHING RATE: DID YOU KNOW THAT ON AVERAGE, YOU TAKE ABOUT 12 TO 20 BREATHS EVERY MINUTE? THAT'S MORE THAN 17,000 BREATHS A DAY! MOST SNAKES ONLY HAVE ONE FUNCTIONING LUNG. HORSES ONLY BREATHE TRHOUGH THEIR NOSES. LUNGS ARE THE ONLY ORGANS THAT CAN FLOAT ON WATER. MOST PEOPLE CAN HOLD THEIR BREATH FOR A MAXIMUN OF ONE MINUTE. THE LEFT LUNG IS OFTEN SMALLER THAN THE RIGHT LUNG, TO MAKE ROOM FOR THE HEART. HUMANS ARE THE ONLY MAMMALS THA CAN’T SWALLOW AND BREATHE AT THE SAME TIME DUE TO THE UNIQUE DESIGN OF THE LARYNX.