1.1.2 Blood Vessels

• What are the three main types of blood vessels?

  Arteries, veins, capillaries
• Arteries have thick elastic walls with smooth muscle layers to transport oxygenated blood away from the heart
• Veins have valves to prevent the backflow of blood.
• Match the blood vessel type with its function:

  Arteries ↔️ Transport oxygenated blood away from the heart

  Veins ↔️ Return deoxygenated blood to the heart

  Capillaries ↔️ Facilitate exchange between blood and tissues
• What type of blood do arteries carry?

  Oxygenated blood
• Veins have thinner walls and valves to return deoxygenated blood to the heart
• Capillaries have single-layer walls to facilitate gas exchange.
• What is the function of veins?

  Return blood to heart
• Capillaries facilitate the exchange of oxygen, nutrients, and waste between blood and tissues
• Order the blood vessel types from highest to lowest blood pressure:

  1️⃣ Arteries

  2️⃣ Veins

  3️⃣ Capillaries
• What is the primary function of arteries?

  Carry oxygenated blood away from the heart
• Veins have thinner walls and valves to prevent blood backflow
• Which blood vessel type has the lowest blood pressure?

  Capillaries
• The tunica media of arteries contains smooth muscle and elastic fibers to control vasoconstriction and vasodilation.
• Match the arterial layer with its function:

  Tunica Intima ↔️ Reduces friction

  Tunica Media ↔️ Controls blood pressure

  Tunica Adventitia ↔️ Supports and protects the artery
• The thick, elastic walls of arteries allow them to withstand high blood pressure
• What enables arteries to regulate blood pressure?

  Their elasticity
• What is the primary function of veins?

  Return deoxygenated blood to heart
• What is the primary function of arteries?

  Transport oxygen-rich blood
• Blood vessels are a network of tubes that transport blood throughout the body
• Arteries have thinner walls compared to veins.

  False
• What is the function of capillaries?

  Facilitate exchange with tissues
• Arteries carry oxygenated blood away from the heart
• Veins contain valves to prevent backflow of blood.
• What is the primary function of veins?

  Return deoxygenated blood
• Match the arterial wall layer with its function:

  Tunica Intima ↔️ Reduces friction

  Tunica Media ↔️ Controls vasoconstriction

  Tunica Adventitia ↔️ Supports the artery
• The innermost layer of the arterial wall is the Tunica Intima
• What is the function of the Tunica Media in arteries?

  Controls vasoconstriction
• The Tunica Adventitia is the thickest layer of the arterial wall.
• Arrange the layers of the vein wall from innermost to outermost:

  1️⃣ Tunica Intima

  2️⃣ Tunica Media

  3️⃣ Tunica Adventitia
• What ensures unidirectional blood flow in veins?

  Valves
• Capillary walls are composed of a single layer of endothelial cells.
• The small diameter of capillaries increases blood flow speed.

  False
• What do veins contain to prevent backflow of blood?

  Valves
• Veins return deoxygenated blood to the heart.
• Capillaries facilitate the exchange of oxygen, nutrients, and waste between blood and tissues
• Match the blood vessel type with its function:

  Arteries ↔️ Transport oxygenated blood away from heart

  Veins ↔️ Return deoxygenated blood to heart

  Capillaries ↔️ Facilitate exchange between blood and tissues
• What type of blood do arteries carry away from the heart?

  Oxygenated
• Capillaries have single-layer thin walls to facilitate exchange.
• The outermost layer of the arterial wall is called the tunica adventitia