Cardiovascular

• What does it consist of

  Heart- muscular organ that pumps blood throughout the body

  blood vessels - arteries ,veins , capillaries

  blood- made up of your red and white blood cells, plasma, platelets.
• Chambers

  Right and left ventricle

  right and left atrium
• Valve’s

  4 valves to stop blood flowing backwards
• Function

  Provide oxygen, nutrients, hormones to muscles, tissues and organs throughout the body.

  removes waste from cells and organs so the body can dispose of it.
• Valves

  Triscupid

  pulmonary

  aortic

  mitral
• 3 layers of the heart

  Outer- epicardium

  middle- myocardium

  inner- endocardium
• Arteries 


  carry oxygenated blood away from the heart

  carry blood under high pressure
• Veins

  Carry deoxygenated blood towards the heart at a low pressure veins contain valves
• overview

  • Deoxygenated blood comes into the right atrium of the body
  • it moves into the right ventricle
  • it is then pushed into the pulmonary arteries in the lungs
  • after picking up oxygen from the lungs the blood travels back to the heart through the pulmonary veins and into the left atrium
  • then to the left ventricle and out of the bodys tissues through the aorta
• outer layer of the hearts functions

  the outer layer is the epicardium its function is to provide protection to the heart
• middle layer of the hearts function

  the middle layer is the myocardium and it is responsible for the pumping action of the heart
• the inner layer of the hearts function

  the inner layer of the heart is the endocardium its function i is to provide a smooth lining for easy movement of blood .
• cardiac conduction

  electrical conduction causes muscle contractions and this is what forces blood in and out of the heart

  the conduction , originates in the sinoatrial node then moves through the conduction pathway causing all areas of the heart to contract