Cardio-respiratory and vascular systems

• label The heart

  Vena carva

  aorta

  right atrium

  right ventricle

  left atrium

  left ventricle

  Pulmonary artery

  pulmonary vein
• Heart functions

  Carry O2 and nutrients

  remove waste products such as CO2 and lactic acid

  thermoregulation to maintain body temp
• Stroke volume

  The volume of blood pumped out of the heart per beat (ml)

  average=70ml
• Heart rate

  The number of times your heart beats a minute (bpm) average=70bpm mine=61
• Cardiac output

  The volume of blood pumped out of the heart per minute (ml)

  cardiac output=hr X stroke volume
• blood pressure

  The pressure exerted by the blood on the blood vessel walls Average=120/80 mmHg
• Systolic BP

  The pressure of the blood when the heart contracts
• Diastolic BP

  The pressure of the blood when the heart relaxes
• Gaseous exchange

  Diffusion of gas from high concentration to low
• Functions of respiratory system

  moves fresh air into your body while removing waste product (CO2)
• Aerobic exercise

  When the body produces energy with the use of O2
• Anaerobic 


  When the body produces energy without the use of O2
• What is the ATP CP system

  Provides energy the fastest

  used for high intensity sports

  supplies energy for 3-10s

  uses creative phosphates

  when this system has ran out we use our next system
• Lactic acid energy system

  Sustains energy supply after 10s during high intensity exercise

  supplies energy for 10-90s

  moderate-high intensity sports eg 400m

  glycogen is used as a fuel source

  produces lactic acid as a bi-product=pain

  glucose->energy+lactic acid
• Aerobic energy system

  Uses O2to produce energy

  slowest energy supplier

  used during low intensity long distance exercise eg marathon runner

  it uses glycogen (carbs) and fats as it’s a useful energy source

  lasts from 90s+

  bi products=water+CO2

  Glucode+O2->energy+H2O+CO2