The heart pack 4

• What type of circulatory system do mammals have?

  Mammals have a double circulatory system.
• What is the function of the heart in the circulatory system?

  The heart pumps blood around the body.
• What happens to deoxygenated blood in the circulatory system?

  Deoxygenated blood is pumped to the lungs to pick up oxygen.
• How does the left ventricle differ from the right ventricle in terms of function?

  The left ventricle pumps oxygenated blood around the whole body, while the right ventricle pumps blood to the lungs.
• What is the equation to calculate cardiac output?

  Cardiac output = heart rate x stroke volume.
• What does stroke volume represent in the context of the heart?

  Stroke volume is the volume of blood pumped by a ventricle each time it contracts.
• If a person has a cardiac output of 5420 mL/min and a stroke volume of 72 mL, what is their heart rate?

  Heart rate = 5420 mL/min / 72 mL = 75 bpm.
• What are the main components of the circulatory system?

  • The heart
  • Blood vessels (arteries, veins, capillaries)
  • Blood
• What are the differences between the right and left sides of the heart?

  • Right side: pumps deoxygenated blood to the lungs.
  • Left side: pumps oxygenated blood to the rest of the body.
• What is the role of valves in the heart?

  • Prevent backflow of blood.
  • Ensure unidirectional flow of blood through the heart.
• How can you find the unknown variable in the cardiac output equation?

  • Cover the variable you want to find.
  • Use the remaining equation to solve for it.