blood vessels

Cards (19)

  • What system did we introduce in the last video?
    The circulatory system
  • What is the primary function of the heart in the circulatory system?

    It acts as the system's pump
  • What are the three types of blood vessels discussed in this video?
    Arteries, capillaries, and veins
  • What is the role of arteries in the circulatory system?

    • Carry blood away from the heart
    • Transport oxygenated blood (except pulmonary arteries)
  • What is the role of capillaries in the circulatory system?

    • Exchange nutrients and oxygen with tissues
    • Remove waste products like carbon dioxide
  • What is the role of veins in the circulatory system?

    • Carry blood back to the heart
    • Transport deoxygenated blood (except pulmonary veins)
  • Why do arteries need to be strong and elastic?

    To withstand high pressures from blood pumped out of the heart
  • What structural features help arteries manage high blood pressure?

    Thick layers of muscle and elastic tissue
  • What is the lumen of a blood vessel?

    The hole or space in the middle of the vessel
  • How are capillaries adapted for their function?

    They have walls that are a single cell thick and are permeable
  • What happens to blood pressure as it moves from arteries to capillaries?

    It decreases
  • Why do capillaries have a large total cross-sectional area?

    To allow for lower blood pressure and slower flow for exchange
  • What is the primary function of veins?

    To transport blood back to the heart
  • What structural features do veins have to assist their function?

    Thin walls, large lumens, and valves
  • What is the purpose of valves in veins?

    To prevent blood from flowing backwards
  • How do you calculate the rate of blood flow?

    By dividing the volume of blood by the time taken
  • If 2500 ml of blood passes through the aorta in 8 minutes, what is the rate of blood flow?

    320 ml/min320 \text{ ml/min}
  • What are the key differences between arteries, capillaries, and veins?
    • Arteries: Thick walls, high pressure, carry blood away from the heart
    • Capillaries: Thin walls, low pressure, exchange substances
    • Veins: Thin walls, large lumens, carry blood back to the heart with valves
  • What is the largest artery in the body?
    The aorta