Transport in mammals

• What are the three types of blood vessels?

  Veins, arteries and capillaries
• Which kind of circulatory system do mammals have?

  They have a double closed circulatory system.
• Describe the size of veins and their job

  Tiny wall, carry blood at LOW PRESSURE
• Describe the size of an artery and its job

  Thick wall, carries blood at a HIGH PRESSURE.
• Describe the size of a capillary and its job

  very small, the walls are one-cell thick
• What kind of blood do arteries and veins carry?

  Arteries carry oxygenated blood, whereas veins carry deoxygenated blood
• Veins have vales


  They are used to prevent backflow of blood
• What's blood composed of?

  Plasma, red blood cells, white blood cells, and platelets.
• What's the job of red blood cells?

  Transport of oxygen
• How do red blood cells look?

  They have a disc shape, with an indent in the middle
• What's the job of white blood cells?

  Defend the body from diseases.
• What's the job of platelets?

  Their job is to cause blood to clot
• What are the factors of coronary heart disease?

  Diet, smoking, stress, genes