Unit 3

• What separates the left and right sides of the heart?

  A septum
• What type of blood does the left side of the heart receive?

  Oxygen-rich or oxygenated blood
• What type of blood does the right side of the heart receive?

  Deoxygenated blood
• Why is the human circulatory system considered efficient?

  Because oxygenated blood is bigger than deoxygenated blood
• What are the key questions regarding blood flow in the heart and body?

  • What is the pathway of oxygenated blood through the heart and body?
  • What is the pathway of deoxygenated blood through the heart and body?
• What is oxygenated blood?

  Blood rich in oxygen
• What is deoxygenated blood?

  Blood that is low in oxygen and high in carbon dioxide
• What happens when a baby is born with a hole in the heart?

  Oxygenated and deoxygenated blood mix
• What sound does a heart make when there is a heart murmur?

  A whooshing sound
• What is the role of the pulmonary circulatory system?

  • Carries blood between the heart and the lungs
  • Transports deoxygenated blood from the right side of the heart to the lungs via pulmonary artery
  • Allows carbon dioxide to leave and oxygen to enter the blood
  • Returns oxygenated blood to the left side of the heart via pulmonary veins
• What is the role of the systemic circulatory system?

  • Carries blood between the heart and the body
  • Transports oxygenated blood from the left side of the heart to the body via the aorta
  • Supplies oxygen and nutrients to body cells
  • Blood vessels are named according to the organs they supply
• How does deoxygenated blood return to the right side of the heart?

  Via the superior vena cava and inferior vena cava
• What happens to carbon dioxide and waste products in the body?

  • They move from the cells of the body into the blood
  • This deoxygenated blood then travels back to the right side of the heart
• What should you do when dissecting a heart in a group activity?

  • Look at the heart
  • Identify various external structures using Figure 7.2
  • Cut the heart through specified areas