Circulatory System

• What is the primary function of the circulatory system in humans?

  To transport substances around the body effectively
• What components make up the circulatory system?

  The heart, blood vessels, and blood
• What type of circulatory system do mammals have?

  A double circulatory system
• What is the difference between deoxygenated blood and oxygenated blood?

  Deoxygenated blood is blood without oxygen, while oxygenated blood is blood with oxygen
• What are the two circuits in the double circulatory system of mammals?

  1. First circuit: Heart pumps deoxygenated blood to the lungs for gas exchange.
  2. Second circuit: Heart pumps oxygenated blood to the rest of the body.
• What happens to deoxygenated blood in the first circuit of the double circulatory system?

  It is pumped to the lungs to take in oxygen
• What happens to oxygenated blood in the second circuit of the double circulatory system?

  It is pumped around all the other organs
• What occurs after oxygenated blood is pumped around the organs?

  The blood returns to the heart to be pumped out to the lungs again
• Do all animals have a double circulatory system?

  No, not all animals have a double circulatory system
• What is the role of the heart in the circulatory system?

  The heart pumps blood throughout the body
• Why is the circulatory system important for multicellular organisms?

  It allows for effective transport of substances necessary for survival