heart and blood vessels

• which blood vessels carry blood away from the heart?

  arteries.
• which blood vessel contains valves?

  veins.
• what is the difference between an artery and a capillary?

  artery: thick, muscular walls, narrow lumen, oxygenated blood, blood at high pressure.

  capillary: one cell thick, mixture of oxygenated and deoxygenated blood, blood at low pressure.
• which blood vessels carry mainly oxygenated blood?

  arteries.
• what is the function of valves in the heart?

  prevent backflow of blood/makes sure blood flows in one direction.
• where does blood go from the left ventricle?

  rest of the body.
• where does blood go from the right ventricle?

  the lungs.
• what are the top chambers of the heart called?

  atria.
• where has blood come from when it enters the right atrium and which blood vessel takes it there?

  the body and vena cava.
• why does the left side of the heart have thicker muscle wall?

  needs to generate more force to send blood to rest of the body.