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The heart is located in the chest cavity. It is surrounded by a covering called the pericardium. The heart itself is divided into four chambers, called the right and left atria and the right and left ventricles.
The heart is connected to the rest of the body by means of VEINS which return to the lungs and the ARTERIES which pump blood to the body. The AORTA is the main artery coming out of the heart and receives blood under great pressure from it.
It is important to note is that the heart itself needs a constant supply of oxygen and nutrients to work (much as a car needs gas to run). This is supplied by the CORONARY ARTERIES which run on the surface of the heart. They come out of the root of the aorta.
There are two coronary arteries: RIGHT AND LEFT. The left is the larger one and is deviled into the LEFT ANTERIOR DESCENDING and the LEFT CIRCUMFLEX.
The left anterior descending (abbreviated LAD) supplies the major portion of the heart including the front wall and most of the middle septum in the heart. Blockage developing in this artery is serious because the resulting heart attack can be large and serious.
The left CIRCUMFLEX supplies the the side of the heart. The RIGHT CORONARY ARTERY supplies the lower part of the heart. In some people this artery is large and can supply the side of the heart as well. It can also be extremely small.
How the heart works:
The main function of the heart is to pump blood containing oxygen and nutrients to the body. The blood is first pumped to the lungs to pick up oxygen and then to the rest of the body. Blood flows inside the heart in an orderly fashion, first going to the right atrium, then to the right ventricle, then to the lungs and finally to the left atrium and left ventricle.
The heart beats almost like a clock, about 60 to 80 times per minute, CONTINUOUSLY, whether you are asleep or awake. The heartbeat is regulated by a small "battery" located in the right atrium called the SINUS NODE. Electric currents travel in the heart by means of minute fiber's in the wall of the heart, much like concealed wiring inside a room.
What else can I help you with?
What is the main job of a heart?
to circulate blood around the human body
What is your heart job?
Your heart's job is to pump blood.
What do job do veins carry out?
The veins carry blood to the heart from the lungs and the body.
What job does the heart carry out?
The heart's job is to pump blood around the body
What are the functions of the great wall of the heart?
The great wall of the heart is made of cardiac muscle tissue. Its main job is to contract so that the valves of the heart open and close as blood is being pumped to the lungs and the whole body.
What does a heart doctor do on the job?
He or She checks on your heart.
What is the main job in Jamaica?
the main job in jamaica is construction
What is the main function of the main heart?
The main function of the heart is to pump blood through the body.
What is the main blood in the heart?
The main blood vessel carrying blood away from the heart is the aorta. The main blood vessel supplying the heart is the left main artery.
What is the job of the heart adapted to the heart?
The job of the heart is to pump oxygenated blood to parts and cells in your body. This is called the circulatory system.
What is the aorta's job?
The aorta's job is to circulate oxygenated blood to the rest of the circulatory system. It is one of the main artery's within the body and it passes from the left ventricle of the heart and goes down to the backbone area.
What is a job of a vein?
Veins carry blood to the heart but never away from the heart. They do the opposite job of an artery.
