Human Anatomy: Blood Vessels Structure
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Questions and Answers

What is the main function of arterioles?

  • To carry blood away from the heart
  • To exchange molecules between blood and tissue fluid
  • To regulate blood flow to tissues (correct)
  • To carry blood towards the heart

    • What is the unique feature of muscular arteries?

  • Thin tunica media
  • High elastin content
  • Thick tunica intima
  • Internal and external elastic laminae (correct)

    • What is the function of precapillary sphincters in capillary beds?

  • To regulate blood pressure
  • To decrease blood flow to tissues
  • To regulate the flow of blood to tissues (correct)
  • To increase blood flow to tissues

    • What is the main function of capillaries?

    <p>To exchange molecules between blood and tissue fluid</p> Signup and view all the answers

    What is the composition of the tunica intima?

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

    What is the function of vasoconstriction and vasodilation?

    <p>To control smooth muscle contraction and relaxation</p> Signup and view all the answers

    What is the role of sphincters in capillary beds?

    <p>To bypass true capillaries and flow through the metarteriole</p> Signup and view all the answers

    What is the function of tight junctions in capillaries?

    <p>To hold endothelial cells together</p> Signup and view all the answers

    What type of capillary is least permeable and most common?

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

    What is the function of pinocytotic vesicles in capillaries?

    <p>To facilitate the transport of molecules across the capillary wall</p> Signup and view all the answers

    Where are fenestrated capillaries typically found?

    <p>In the kidney and small intestine</p> Signup and view all the answers

    What is the primary function of valves in some veins, particularly in limbs?

    <p>To counteract low venous pressure</p> Signup and view all the answers

    What is the name of the arteries that nourish the outer region of large vessels?

    <p>Vasa vasorum</p> Signup and view all the answers

    Which pulmonary artery branches into the right and left pulmonary arteries?

    <p>Pulmonary trunk</p> Signup and view all the answers

    What is the largest artery in the body?

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

    What is the name of the artery that supplies oxygenated blood to the head and neck?

    <p>Internal carotid artery</p> Signup and view all the answers

    What is the function of the skeletal muscle pump in veins?

    <p>To counteract low venous pressure</p> Signup and view all the answers

    What is the name of the artery that supplies oxygenated blood to the brain?

    <p>Internal carotid artery</p> Signup and view all the answers

    What is the name of the vein that carries oxygenated blood from the lungs to the left atrium?

    <p>Pulmonary vein</p> Signup and view all the answers

    What is the name of the artery that supplies oxygenated blood to the abdominal organs?

    <p>Celiac trunk</p> Signup and view all the answers

    What is the name of the artery that supplies oxygenated blood to the upper limb?

    <p>Subclavian artery</p> Signup and view all the answers

    Which artery is responsible for supplying the ascending colon?

    <p>Superior mesenteric artery</p> Signup and view all the answers

    Which vein drains the liver and empties into the inferior vena cava?

    <p>Hepatic vein</p> Signup and view all the answers

    What is the function of the hepatic portal system?

    <p>Pick up digested nutrients and deliver them to the liver for processing</p> Signup and view all the answers

    Which artery is responsible for supplying the sigmoid colon?

    <p>Inferior mesenteric artery</p> Signup and view all the answers

    What is the name of the vein that drains the small intestine?

    <p>Superior mesenteric vein</p> Signup and view all the answers

    Which artery is responsible for supplying the head and neck?

    <p>Internal carotid artery</p> Signup and view all the answers

    What is the name of the vein that drains the brain?

    <p>Dural sinus</p> Signup and view all the answers

    Which artery is responsible for supplying the lower limb?

    <p>External iliac artery</p> Signup and view all the answers

    What is the name of the vein that drains the liver and empties into the inferior vena cava?

    <p>Hepatic vein</p> Signup and view all the answers

    Which vein drains the superficial tissues of the lower limb?

    <p>Great saphenous vein</p> Signup and view all the answers

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