Blood Vascular System
16 Questions
4 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a characteristic of the intima in a medium-sized artery?

  • Thin and not folded
  • Thick and folded (correct)
  • Thick and not folded
  • Thin and folded
  • Which of the following is true about the media in a medium-sized artery?

  • Thick with circularly arranged smooth muscle fibers (correct)
  • Thin with longitudinally arranged smooth muscle fibers
  • Thin with circularly arranged smooth muscle fibers
  • Thick with longitudinally arranged smooth muscle fibers
  • What is a characteristic of the adventitia in a medium-sized vein?

  • Thick with collagen fibers and vasa vasorum (correct)
  • Thick with elastic fibers and nerves
  • Thin with elastic fibers and nerves
  • Thin with collagen fibers and vasa vasorum
  • Which of the following is a characteristic of basilar arteries?

    <p>Thin wall, thin intima, thin media, and thin adventitia</p> Signup and view all the answers

    What is a characteristic of the lumen in a medium-sized artery?

    <p>Narrow and thick-walled</p> Signup and view all the answers

    Which of the following is true about the internal elastic lamina in a medium-sized artery?

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

    What is a characteristic of the media in a medium-sized vein?

    <p>Thin with circularly arranged smooth muscle fibers</p> Signup and view all the answers

    Which of the following is true about valves in medium-sized veins?

    <p>Sometimes present</p> Signup and view all the answers

    What is the function of the internal elastic lamina in the tunica intima?

    <p>To prevent complete occlusion of vessels during contraction</p> Signup and view all the answers

    What type of epithelium makes up the innermost layer of the blood vascular system?

    <p>Simple squamous epithelium</p> Signup and view all the answers

    What is the main component of the tunica media?

    <p>Circularly arranged smooth muscles</p> Signup and view all the answers

    What is the outermost layer of the blood vascular system?

    <p>Tunica adventitia</p> Signup and view all the answers

    What is unique about the aorta?

    <p>It is a long, elastic artery with a wide lumen</p> Signup and view all the answers

    What is the characteristic of the tunica intima in the aorta?

    <p>It is thick and has an unapparent internal elastic lamina</p> Signup and view all the answers

    What is the characteristic of the tunica media in the aorta?

    <p>It is very thick and formed of circularly arranged perforated elastic lamina</p> Signup and view all the answers

    What is the characteristic of the tunica adventitia in the aorta?

    <p>It is thin and formed of fibro-elastic connective tissue</p> Signup and view all the answers

    Study Notes

    Blood Vascular System

    • The blood vascular system consists of the heart, arterial side, and venous side.
    • The arterial side includes the aorta, distributing arteries, arterioles, and arterio-venous connections (capillaries).
    • The venous side includes the superior and inferior vena cava, collecting veins, venules, and small venules that end at the arterio-venous connection.

    Layers of the Blood Vessel Wall

    • The wall of the blood vascular system is formed of three main layers: tunica intima, tunica media, and tunica adventitia.
    • Tunica intima is the innermost layer, formed of simple squamous epithelium (endothelium) and a sub-endothelial layer of areolar connective tissue.
    • Internal elastic lamina is the most external component of tunica intima, preventing complete occlusion of vessels during contraction.
    • Tunica media is the middle layer, formed of circularly arranged smooth muscles, a variable amount of connective tissue, and external elastic lamina.
    • Tunica adventitia is the outermost layer, formed of areolar connective tissue containing blood vessels (Vasa vasorum) and nerves.

    Characteristics of the Aorta

    • The aorta is a long, elastic artery with a wide lumen.
    • It has a very thick elastic wall.
    • The intima is thick, consisting of endothelium, subendothelium, and an unapparent internal elastic lamina.
    • The media is very thick, formed of circularly arranged perforated elastic lamina with smooth muscle fibers in between, and an unapparent external elastic lamina.
    • The adventitia is thin, formed of fibro-elastic connective tissue containing Vasa vasorum and nerves.

    Medium-Sized Artery

    • It has a thick wall but a narrow lumen.
    • It has no valve in its lumen.
    • The intima is thick and folded, consisting of endothelium, subendothelium, and an internal elastic lamina.
    • The media is thick, consisting of circularly arranged smooth muscle fibers with some elastic fibers and an external elastic lamina.
    • The adventitia is thin, containing elastic fibers and nerves.

    Medium-Sized Vein

    • It has a thin wall but a wide lumen.
    • Valves may be present in some veins.
    • The intima is thin, not folded, and has no internal elastic lamina.
    • The media is thin, with no external elastic lamina.
    • The adventitia is thick, rich in collagen fibers, with Vasa vasorum and nerve fibers.

    Comparison of Medium-Sized Artery and Vein

    • The wall of the medium-sized artery is thicker, while the wall of the medium-sized vein is thinner.
    • The lumen of the medium-sized artery is narrower, while the lumen of the medium-sized vein is wider.
    • The intima of the medium-sized artery is thicker, while the intima of the medium-sized vein is thinner.
    • The internal elastic lamina is present in the medium-sized artery but absent in the medium-sized vein.
    • The media of the medium-sized artery is thicker, with elastic fibers and smooth muscles, while the media of the medium-sized vein is thinner, with fewer elastic fibers.
    • The adventitia of the medium-sized artery is thinner, with more elastic fibers, while the adventitia of the medium-sized vein is thicker, with more collagenous fibers and Vasa vasorum.
    • Valves are absent in the medium-sized artery but may be present in the medium-sized vein.

    Basilar Artery

    • It supplies the brain tissue.
    • It has a thin wall, thin intima, thin media, and thin adventitia.
    • It has a well-developed internal elastic lamina.

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    This quiz covers the structure and components of the blood vascular system, including the heart, arteries, arterioles, capillaries, veins, and more.

    More Like This

    Heart Anatomy and Blood Circulation
    6 questions
    Heart Function in Blood Circulation
    10 questions
    Blood Circulation Pathway
    30 questions

    Blood Circulation Pathway

    AccomplishedBixbite avatar
    AccomplishedBixbite
    Use Quizgecko on...
    Browser
    Browser