Heart Board Notes
Heart is located in the chest cavity directly behind the sternum.
The heart a hollowed four chambered organ made of Cardiac muscle.
Cardiac muscle is involuntary.
The upper chambers are ATRIUM
The lower chambers are VENTRICLES
Atrium receive blood from the body and ventricles pump blood away from the heart.
Veins bring blood back to the heart
Arteries carry blood away from the heart
Blood moves through the heart in only one direction because of valves.
Path of Blood.
Vena cava to right atrium to right ventricle to lungs return to left atrium to left ventricle to aorta
The heart feeds is own muscle with a group of arteries known as coronary arteries These are the arteries that are involved in heart attacks. If they become blocked
Blood pressure
Your blood pressure is measured twice once when the left ventricle pumps and once when the left ventricle is resting.
Systolic 120 normal blood pressure over 139 systolic or 90 diastolic is high
Diastolic 80
Blood
Liquid part of blood called plasma
Red blood cellos carry oxygen
White blood cells fight infections
Platelets stop bleeding
HEART DISEASE --Number one killer in USA
THE BLOCKING OR NARROWING OF THE BLOOD VESSELS THAT FEED THE HEART MUSCLE.
Risk Factors
Male or Female- Men have more Heart Problems
Old or young- old have more Heart Problems
Smoking or no Smoking Smokers-have more Heart Problems
High Fat Diet or Balanced Diet-High Fat have more Heart Problems
Blood Cholesterol High or Under 200- High have more Heart Problems
Exercise or no Exercise- No exercise have more Heart Problems
We can control our diet, smoking habits and exercise habits.
Target Heart Rate
Exercising safely to make your heart stronger
How to find.
220 minus your age times .65 = lowest number
220 minus your age times .85 = Highest number
Example 48 year old person
220 - 48=172 172 * .65 = 112 beats per minute
220 - 48=172 172 * .85 = 146 beats per minute
This person would have to exercise for twenty to thirty minutes three to four days a week and keep his heart rate between 112 and 146.
This will make his heart stronger.
