Heart

All I need to know about the heart:

  • Disease
  • Valves
  • Structure
  • Function
  • Blood Flow
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Structure of the Heart

Right Side in Order going Down: (deoxygenated)(left side on paper)

  • pulmonary artery
  • semi-lunar valve
  • vena cava
  • right atrium
  • right atrioventricular valve (AV)
  • tricuspid valve
  • tendon supporting valve
  • right ventricle
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Structure of the Heart

Left Side in Order going Down (oxygenated)(right side on paper)

  • aorta
  • pulmonary artery
  • pulmonary vein
  • left atrium
  • left atrioventricular valve (AV)
  • bicuspid valve
  • left ventricle
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General Questions (1)

1. Why is the left ventricle thicker than the right?

2. Name the 3 types of valve.

3.What is the function of the valves?

4.What happens to the pressure inside a chamber when it contracts?

5.Name the blood vessels which supply the heart with blood.

6.Why does the heart need a rich blood supply?

7.What type of muscle is found in the heart?

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Answers to General Questions (1)

1.Has to send the blood all over the body so it needs high pressure.

2.Bicuspid,Tricuspid,Semi-lunar.

3.To prevent backflow of blood.

4.It Increases.

5.Coronary Artery

6.Oxygen and glucose for respiration and energy.

7.Cardiac Muscle

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Opening and Closing of the Valves (gaps)

The AV valve is found between an atrium and a ventircle. The AV valve opens when the pressure in the 1 is higher than in the 2 and closes when the pressure in the 3 is higher than in the 4.

The semi-lunar valves are found between the aorta and the left ventricle and between the pulmonary artery and right ventricle. The semi-lunar valve open when the pressure in the 5 is greater than in the 6 and closes when the pressure in the 7 is higher than in the 8.

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Opening and Closing of the Valves (gaps answers)

  • 1-atrium
  • 2-ventricles
  • 3-ventricles
  • 4-atrium
  • 5-ventricles
  • 6-arteries
  • 7-arteries
  • 8-ventricles
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Blood Flow (gaps)

  • 1-right ventricle
  • 2-pulmonary artery
  • 3-lungs
  • 4-pulmonary vein
  • 5-left atrium
  • 6-left ventricle
  • 7-aorta
  • 8-bodya
  • 9-vena cava
  • 10-right atrium
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(Lub & Dub) (Atherosclerosis)

  • Lub- is when the AV valve is forced shut creating that 'lub' sound!
  • Dub- is when the semi-lunar vlaveas are forced shut creating that 'dub' sound!

Atherosclerosis: a progressive disease that causes the narrowing of the lumen (hole in the middle) of an artery. 2 theories: endothelium of an artery is damaged (harmful chemicals or blow to chest) or fatty materials leaking into the endothelium.Once the endothelium has disrupted this occurs;

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Coronary Heart Disease

  • fats are taken from the blood plasma and form swollen fat-laden cells (1) beneath the endothelium.
  • muscle cells and fibres grow into the region of the (1) producing a (2) and bulge in the lumen (atherosclerosis).
  • eventually (2) becomes so large that it tears the endothelium of the artery.A blood clot forms at this tear called a (3) meaning the formation of blood clots within blood vessles is (4).
  • a (3) that breaks away is a (5).This will travel in the blood till it becomes trapped in a small artery and blocks it i.e (6).If a (6) forms it can be fatal.
  • the build up in pressure can swell and weaken an artery.This is an (7).(7) often burst leadin to loss of blood.Brain (7) is a (8).
  • caridac muscle gets 'cramps' when coronary arterys are partialy blocked, often associated with chest pain called (9).
  • if a coronary artery becomes completely blocked the cardiac muscle that it supplies will die.Death to areas of a cardiac muscle is called a (10).
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Coronary Heart Disease Answers

1- atheroma

2- plaque

3- thrombus

4- thrombosis

5- embolus

6- embolism

7- aneurysm

8- stroke

9- angina

10- Myocardical Infarction

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