The heart is a mostly hollow, muscular organ composed of cardiac muscles and connective tissue that acts as a pump to distribute blood throughout the body’s tissues.
The heart is the epicenter of the circulatory system, which supplies the body with oxygen and other important nutrients needed to sustain life.
The heart has a doubles pump feature that transports blood away from it and back to it. Freshly oxygenated blood leaves the left side of the heart through the ascending aorta a the largest artery in the human body. Blood flowing through the right side of the heart is returning from all over the body before it is sent to the lungs where it receives oxygen.
The heart has three layers. They are the
Epic atrium: This thin membrane is the outermost layer of the heart.
Myocardial: This thick layer is the muscle that contracts to pump and propel blood through the body’s tissues.
End of atrium: The innermost layer is thin and smooth.
The heart is divided into four chambers: two atria and two ventricles. Blood is transported through the body via a complex network of veins and arteries.
The average human heart weighs between 6 and 11 ounces. The muscle is strong enough to pump up to 2,000 gallons as much as a fire department’s tanker truck of blood through one’s body every day.
The average heart beats between 60 and 90 times per minute, but this depends on a person’s cardiovascular health and activity level. The more physically fit people are, the lower their resting heart rates will be.
Hormones released because of emotions and other stimuli affect the heart rate, which is why the heart was historically associated with emotions.
Those three things can raise your risk for heart disease. Most adults need 7 to 9 hours of sleep per night. Make sure that you have good sleep habits. If you have frequent sleep problems, contact your health care provider. One problem, sleep apnea, causes people to briefly stop breathing many times during sleep. This interferes with your ability to get a good rest and can raise your risk of heart disease. If you think you might have it, ask your doctor about having a sleep study. And if you do have sleep apnea, make sure that you get treatment for it.
Heart disease is the leading cause of death in the Africa. It is also a major cause of disability. There are many things that can raise your risk of heart disease. They are called risk factors. Some of them you cannot control, but there are many that you can control. Learning about them can lower your risk of heart disease.
Age. Your risk of heart disease increases as you get older. Men age 45 and older and women age 55 and older have a greater risk.
Gender. Some risk factors may affect heart disease risk differently in women than in men. For example, estrogen provides women some protection against heart disease, but diabetes raises the risk of heart disease more in women than in men.
The heart is a muscle about the size of your fist. It pumps blood around your body and beats approximately 70 times a minute.
After the blood leaves the right side of the heart, it goes to your lungs where it picks up oxygen.
The oxygens rich blood returns to your heart and is then pumped to the body's organs through a network of arteries.
The blood returns to your heart through veins before being pumped back to your lungs again. This process is called circulation.
The heart gets its own supply of blood from a network of blood vessels on the heart's surface called coronary arteries
Race or ethnicity. Certain groups have higher risks than others.
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