THE HUMAN HEART

WHAT IS THE HUMAN HEART?

• The human heart is a muscular organ
• It is about the size of a closed fist
• It's job is to pump blood around the body
• It pumps blood to all of your organs and muscles

PUMPING BLOOD

• Your heart beats 100,000 times a day
• In an average life time, it beats 3.5 billion times
• 2,000 gallons of blood is pumped through your heart each day
• There are 60,000 miles worth of veins and arteries to pump blood to

LOCATION OF THE HEART

• Your heart is located in the chest cavity
• Behind your rib cage and in between your lungs
• Behind your breast bone
• You can feel it beat to the left of your chest, or beneith your chin

THE FOUR CHAMBERS

• Upper left - left atrium
• Upper right - right atrium
• Lower left - left ventricles
• Lower right - right ventricles

VALVES

• Valves are the tubular shaped muscles on all sides of your heart
• They stop the back flow of blood
• There are four main valves - mitral, aortic, pulmanary, tricuspid
• The Tricuspid holds blood coming in and is in the right atrium
• The pulmanary gives blood to the lungs and is in the right ventricle

VALVES

• The Aortic valve allows blood to leave the heart it is in the left ventricle
• The Mitral valve collects oxygenated blood from the lungs is in the left atrium

WHAT ABOUT BLOOD?

• One drop of blood contains 5 million red blood cells
• By the time you are ten years old, you have up to 4 pints of blood
• There are four main kinds of blood and different variations of them
• A, Ab, B, O
• A new born baby has one cup of blood in his or her's body

VEINS AND ARTERIES

• Veins and arteries are transportation for blood
• The Vena Cava is your biggest vein - on the right side of your spine
• The Aorta is your bigest artery - on the left side of your spine
• Arteries carry your blood out from your heart, and veins bring it back
• Atreries carry oxygenated blood out, and veins bring it back to get oxygen

FUN FACTS

• One pint of blood donated can save up to three lives
• It is proven, laughter is medicine - 20% more blood flow
• Your heart weighs about 7-15 ounces
• a kitchen fauctet would need to be turned on for 45 years
• to equal the amount of blood pumped in a lifetime.

FUN FACTS

• Becuase of it's electricle pulse, your heart will beat outside of your body
• Man = 70 x per minute Girls = 78 x per minute
• Your heart skips a beat when you sneeze
• Your heart starts to beat as early as 4 weeks
• Heart diseases have been found in 3,000 year old mummies