open or closed circulatory system

• what are the two types of circulatory systems


  open and closed
• what type of animals have open circulatory system


  insects
• what type of animals have a closed circulatory system


  mammals and fish and earthworms
• what is another name for a insects open circulatory system


  tracheal system
• What is the haemocoel?


  this is the body fluid in an insects body cavity
• where is the haemocoel in insects


  it is in the body cavity
• what is the shape of an insects heart


  long dorsal tube
• where is the insects heart


  it runs across the top of the insects interior body
• what is haemolymph


  this is insect blood
• what is the gas exchange surface in insects

  haemolymph
• what happens when to the haemolymph when the insect heart is relaxing


  it is slowly sucked back into the heart
• what is meant by a closed system


  all the gas exchange and circulation takes place in blood vessels
• what pumps the blood around a closed circulatory system


  the heart
• in closed systems what pressure is blood transported around at


  high pressure with a rapid flow rate
• how are the organs connected to the blood stream

  it is bathed in tissue fluid
• what is the respiratory pigment in closed circulatory systems


  heamoglobin
• what type of ventricles run across the length of a earthworm


  dorsal and ventral vessels
• what is the type of heart in a earthworm


  a pseudoheart
• do earthworms have a respiratory pigment


  yes
• in which direction do veins take the blood


  they take blood toward to the heart
• in which direction do arteries take blood


  they take blood away from the heart