31 Questions
What is the main function of arterioles?
To regulate blood flow to tissues
What is the unique feature of muscular arteries?
Internal and external elastic laminae
What is the function of precapillary sphincters in capillary beds?
To regulate the flow of blood to tissues
What is the main function of capillaries?
To exchange molecules between blood and tissue fluid
What is the composition of the tunica intima?
Simple squamous epithelium
What is the function of vasoconstriction and vasodilation?
To control smooth muscle contraction and relaxation
What is the role of sphincters in capillary beds?
To bypass true capillaries and flow through the metarteriole
What is the function of tight junctions in capillaries?
To hold endothelial cells together
What type of capillary is least permeable and most common?
Continuous capillary
What is the function of pinocytotic vesicles in capillaries?
To facilitate the transport of molecules across the capillary wall
Where are fenestrated capillaries typically found?
In the kidney and small intestine
What is the primary function of valves in some veins, particularly in limbs?
To counteract low venous pressure
What is the name of the arteries that nourish the outer region of large vessels?
Vasa vasorum
Which pulmonary artery branches into the right and left pulmonary arteries?
Pulmonary trunk
What is the largest artery in the body?
Aorta
What is the name of the artery that supplies oxygenated blood to the head and neck?
Internal carotid artery
What is the function of the skeletal muscle pump in veins?
To counteract low venous pressure
What is the name of the artery that supplies oxygenated blood to the brain?
Internal carotid artery
What is the name of the vein that carries oxygenated blood from the lungs to the left atrium?
Pulmonary vein
What is the name of the artery that supplies oxygenated blood to the abdominal organs?
Celiac trunk
What is the name of the artery that supplies oxygenated blood to the upper limb?
Subclavian artery
Which artery is responsible for supplying the ascending colon?
Superior mesenteric artery
Which vein drains the liver and empties into the inferior vena cava?
Hepatic vein
What is the function of the hepatic portal system?
Pick up digested nutrients and deliver them to the liver for processing
Which artery is responsible for supplying the sigmoid colon?
Inferior mesenteric artery
What is the name of the vein that drains the small intestine?
Superior mesenteric vein
Which artery is responsible for supplying the head and neck?
Internal carotid artery
What is the name of the vein that drains the brain?
Dural sinus
Which artery is responsible for supplying the lower limb?
External iliac artery
What is the name of the vein that drains the liver and empties into the inferior vena cava?
Hepatic vein
Which vein drains the superficial tissues of the lower limb?
Great saphenous vein
Test your knowledge of the structure of blood vessels, including the three tunics, arteries, veins, and capillaries. Learn about vasoconstriction, vasodilation, and the functions of each layer.
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