Cardiovascular System

• The Cardiovascular System

  • Made up of 3 elements:
  • The heart: a muscular pump that pushes blood through the body
  • The blood vessels: a network of tubes that blood flows through
  • The blood: which circulates through the vessels

  
• The heart


  A pump: a mechanical device that moves fluid from one place to another by mechanical action
• The heart


  • Has high pressure output lines (tubes) and low-pressure input (return) lines
  • We call these lines (tubes) vessels

  
• Types of blood vessels


  • Arteries: Carry blood away from heart (high pressure)
  • Capillaries: Thin tubes where material exchanges between blood and cell
  • Veins: Transports blood back to heart (low pressure)
• Arteries


  • Must be able to expand because the heart pressurizes the blood in burst
  • Each burst is called a pulse
  • To check your pulse you must find an artery

  
• Most of the exchange between tissue and blood cells occurs in the capillaries

  
• Circulatory system


  • Transports blood to every cell

  
• Respiratory system


  • Transports oxygen to every cell
• Digestive system


  • Breaks down food into nutrients that can be absorbed through the intestinal wall and into the blood
• Other transportation systems exist
• Circulatory system


  Also called the vascular system, made up of 3 elements
• Elements of the circulatory system


  • The heart
  • The blood vessels
  • Blood

  
• The heart


  • A muscular pump that pushes blood through the body
• Pump

  A mechanical device that moves fluid from one place to another by mechanical action
• The heart


  Like most mechanical pumps, has high pressure output lines (tubes) and low-pressure input (return) lines (tubes)
• Vessels


  The lines (tubes) that the blood flows through

  
• Types of blood vessels

  • Arteries
  • Capillaries
  • Veins

  
• Arteries


  • Carry blood away from heart (high pressure)
• Capillaries


  • Thin tubes where material exchanges between blood and cell
• Veins


  • Transports blood back to heart (low pressure)
• Arteries


  • Must be able to expand because the heart pressurizes the blood in burst
• Pulse


  Each burst of blood from the heart
• Most of the exchange between tissue and blood cells occurs in the capillaries
• Transportation systems in the body

  • Circulatory
  • Respiratory
  • Digestive
• Circulatory system


  Transports blood to every cell
• Respiratory system


  Transports oxygen to every cell
• Digestive system


  Breaks down food into nutrients that can be absorbed through the intestinal wall and into the blood