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.


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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