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Changes In Function Of a Body System And Angina. Essay

  • Submitted by: pollydolly1978
  • on December 6, 2011
  • Category: Miscellaneous
  • Length: 503 words

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Below is an essay on "Changes In Function Of a Body System And Angina." from Anti Essays, your source for research papers, essays, and term paper examples.

Changes in function of body systems as a result of a disease or injury.
Angina

Report: Introduction to Angina, normal function of the heart, changes in functioning of the heart due to angina and a reference list of source material.

Changes in function of body systems as a result of a disease or injury.
Angina
Introduction to Angina
Angina is a syndrome that is caused when the supply of oxygen rich blood to the heart becomes restricted.
The most common symptom is chest pain usually triggered by physical activity.
The majority of cases are caused by the arteries of the heart becoming hardened and narrower, restricting the supply of blood.
Risk factors include: Advanced age, smoking, obesity and a high fat diet.
Angina is a common syndrome particularly among older people.

The normal function of the heart.
The heart is a muscular pump in the centre of the chest that beats continuously and rhythmically to send blood to the lungs and the rest of the body. The heart muscle is supplied with oxygen and nutrients by two coronary arteries.
Inside the heart there are four chambers. A thick central muscular wall, the septum, divides the heart into right and left halves. Each half consists of an upper chamber, called an atrium, and a lower chamber, called a ventricle.
The right atrium receives deoxygenated blood from the entire body via two large veins called the vena cava. This blood is transferred to the right ventricle and pumped into the lungs via the pulmonary artery to be oxygenated and to lose carbon dioxide.
The left atrium of the heart receives oxygenated blood from the lungs via the pulmonary veins; this blood is transferred to the left ventricle and then pumped to all tissues in the body.
One way valves at the exits from each chamber ensure that blood flows only in one direction.
As resistance to blood flow through the general circulation is much greater than resistance through the lungs, the left side of the heart must contract more forcibly...

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