Cardiovascular System Circulation
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Questions and Answers

What is the main function of the circulatory system?

  • Producing hormones for the body
  • Transporting oxygen to the lungs
  • Moving blood away from and towards the heart (correct)
  • Regulating body temperature

    • Which vessels are responsible for carrying blood away from the heart?

  • Venules
  • Arteries (correct)
  • Veins
  • Capillaries

    • Which of the following blood vessels carries blood back to the heart?

  • Arteries
  • Veins (correct)
  • Capillaries
  • Venules

    • In the circulatory system, what is the role of capillaries?

    <p>To exchange nutrients and waste products with tissues</p> Signup and view all the answers

    Which part of the body is mainly responsible for pumping blood through the circulatory system?

    <p>Heart</p> Signup and view all the answers

    What is the primary function of the tunica intima in the circulatory system?

    <p>To provide a smooth surface for blood flow</p> Signup and view all the answers

    What type of cells make up the tunica intima?

    <p>Endothelial cells</p> Signup and view all the answers

    What is the significance of the tunica intima's smooth surface?

    <p>It reduces blood flow resistance</p> Signup and view all the answers

    What is the continuous layer of cells that lines the innermost layer of blood vessels and the heart?

    <p>Endothelium</p> Signup and view all the answers

    What is the primary benefit of the tunica intima's smooth surface in terms of blood flow?

    <p>Decreased blood flow resistance</p> Signup and view all the answers

    What is the purpose of the smooth surface provided by the tunica intima?

    <p>To reduce friction and allow blood to flow smoothly</p> Signup and view all the answers

    What type of cells are responsible for forming the tunica intima?

    <p>Epithelial cells</p> Signup and view all the answers

    What is the tunica intima continuous with?

    <p>The endothelium of the endocardium</p> Signup and view all the answers

    What is the main characteristic of the tunica intima?

    <p>Thin and epithelial</p> Signup and view all the answers

    What is the functional importance of the endothelial cells in the tunica intima?

    <p>They provide a smooth surface for blood flow</p> Signup and view all the answers

    The tunica intima is the outermost layer of blood vessels.

    <p>False</p> Signup and view all the answers

    The endothelial cells in the tunica intima are responsible for pumping blood through the circulatory system.

    <p>False</p> Signup and view all the answers

    The tunica intima is composed of epithelial cells other than endothelial cells.

    <p>False</p> Signup and view all the answers

    The smooth surface of the tunica intima helps to increase blood flow resistance.

    <p>False</p> Signup and view all the answers

    The endothelium of the endocardium is not continuous with the endothelial cells in the tunica intima.

    <p>False</p> Signup and view all the answers

    The tunica intima is the middle layer of blood vessels.

    <p>False</p> Signup and view all the answers

    The tunica intima is composed of endothelial cells which are a type of epithelial cells.

    <p>True</p> Signup and view all the answers

    The smooth surface of the tunica intima increases blood flow resistance.

    <p>False</p> Signup and view all the answers

    The endothelial cells of the tunica intima are discontinuous with the endothelium of the endocardium.

    <p>False</p> Signup and view all the answers

    The tunica intima is responsible for pumping blood through the circulatory system.

    <p>False</p> Signup and view all the answers

    Match the following components of blood vessels with their characteristics:

    <p>Tunica intima = Provides a smooth surface for blood flow Endothelial cells = Type of epithelial cells lining blood vessels Endocardium = Lining of the heart chambers Endothelium = Lining of blood vessels and heart chambers</p> Signup and view all the answers

    Match the following components of blood vessels with their functions:

    <p>Tunica intima = Reduces blood flow resistance Endothelial cells = Pumping blood through the circulatory system Endocardium = Lining of the heart chambers Endothelium = Forming the innermost layer of blood vessels</p> Signup and view all the answers

    Match the following components of blood vessels with their relationships:

    <p>Tunica intima = Continuous with endothelium of endocardium Endothelial cells = Discontinuous with endothelium of endocardium Endocardium = Separate from tunica intima Endothelium = Not related to tunica intima</p> Signup and view all the answers

    Match the following components of blood vessels with their types:

    <p>Tunica intima = Innermost layer Endothelial cells = Epithelial cells Endocardium = Middle layer Endothelium = Outermost layer</p> Signup and view all the answers

    Match the following components of blood vessels with their benefits:

    <p>Tunica intima = Increases blood flow efficiency Endothelial cells = Provides a rough surface for blood flow Endocardium = Reduces blood flow resistance Endothelium = Has no effect on blood flow</p> Signup and view all the answers

    Arteries carry deoxygenated blood from the heart to the lungs.

    <p>False</p> Signup and view all the answers

    Capillaries are microscopic blood vessels that are only one muscle cell thick.

    <p>False</p> Signup and view all the answers

    Veins have thicker walls than arteries.

    <p>False</p> Signup and view all the answers

    The aorta originates from the right ventricle.

    <p>False</p> Signup and view all the answers

    Venules and veins have valves to ensure bidirectional flow of blood.

    <p>False</p> Signup and view all the answers

    Arteries have a lower pressure than veins.

    <p>False</p> Signup and view all the answers

    Arteries of the systemic circulation carry oxygenated blood away from the ______ to the body

    <p>heart</p> Signup and view all the answers

    Arteries have thick tunica media (smooth muscle and elastic layers). Muscle allows contraction, maintain steady blood pressure. Elastic fibres allow stretching and recoiling without ______

    <p>rupturing</p> Signup and view all the answers

    Blood within arteries is at high ______

    <p>pressure</p> Signup and view all the answers

    Site of gas and nutrient exchange – very important. Microscopic blood vessels – only one endothelial cell thick, allows for transfer of nutrients and gas exchange with the tissues. Found in networks called ______

    <p>capillary beds</p> Signup and view all the answers

    Venules & Veins are thinner walled than arteries – still have the same three layers. But has a smaller Tunica media – minimal muscle. Carry deoxygenated blood back to the ______

    <p>heart</p> Signup and view all the answers

    Arteries Aorta – the main artery of the body. Originates from the left ventricle. Supplies the entire ______

    <p>body</p> Signup and view all the answers

    Match the blood vessel type with its characteristic:

    <p>Arteries = Thick tunica media (smooth muscle and elastic layers) Venules = Thin walls, small branches of arteries Capillaries = Site of gas and nutrient exchange Veins = Thinner walled with smaller tunica media</p> Signup and view all the answers

    Match the blood vessel component with its role:

    <p>Elastic fibres = Allows arteries to stretch and recoil without rupturing Valves in veins = Ensure uni-directional flow of blood Endothelial cells = Line the innermost layer of blood vessels and heart Smooth muscle in arteries = Allows for contraction and steady blood pressure</p> Signup and view all the answers

    Match the artery with its function:

    <p>Aorta = Supplies the entire body with oxygenated blood Pulmonary arteries = Take deoxygenated blood to the lungs for re-oxygenation Coronary arteries = Supply blood to the heart muscle Carotid arteries = Supply blood to the brain</p> Signup and view all the answers

    Match the blood vessel layer with its composition:

    <p>Tunica intima = Composed of endothelial cells Tunica media = Contains smooth muscle and elastic layers Tunica externa = Outermost layer providing structural support Endothelium = Single layer of endothelial cells for exchange processes</p> Signup and view all the answers

    Match the blood flow characteristic with the blood vessel type:

    <p>High pressure = Arteries Low pressure = Veins Bidirectional flow = Venules Pulsatile flow = Arteries</p> Signup and view all the answers

    Match the vein with its specific feature:

    <p>Cranial Vena Cava = One of the largest veins in the body Caudal Vena Cava = Carries deoxygenated blood back to the heart Superior Vena Cava = Drains blood from the upper part of the body to the heart Inferior Vena Cava = Drains blood from the lower part of the body to the heart</p> Signup and view all the answers

    Match the following components of blood vessels with their characteristics:

    <p>Arteries = Carry oxygenated blood away from the heart to the body Veins = Carry deoxygenated blood back to the heart Capillaries = Site of gas and nutrient exchange Venules = Thinner walled than arteries</p> Signup and view all the answers

    Match the following components of blood vessels with their functions:

    <p>Aorta = Supplies the entire body Pulmonary arteries = Take deoxygenated blood to the lungs Cranial Vena Cava and Caudal Vena Cava = Carry deoxygenated blood back to the heart Capillaries = Carry oxygenated blood away from the heart</p> Signup and view all the answers

    Match the following components of blood vessels with their characteristics:

    <p>Arteries = Thicker walls with smooth muscle and elastic layers Veins = Thinner walls with minimal muscle Capillaries = One endothelial cell thick Venules = Large vessels with high pressure</p> Signup and view all the answers

    Match the following components of blood vessels with their characteristics:

    <p>Arteries = High pressure and pulse can be felt Veins = Low pressure and no pulse can be felt Capillaries = Allow for gas and nutrient exchange Venules = Have valves to ensure bidirectional flow</p> Signup and view all the answers

    Match the following components of blood vessels with their functions:

    <p>Arteries = Carry blood away from the heart Veins = Carry blood back to the heart Capillaries = Allow for gas and nutrient exchange Venules = Supply oxygenated blood to the body</p> Signup and view all the answers

    Match the following components of blood vessels with their characteristics:

    <p>Arteries = Can feel a pulse with gentle compression Veins = Have valves to ensure uni-directional flow Capillaries = Found in networks called capillary beds Venules = Thinner walled than arteries with minimal muscle</p> Signup and view all the answers

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