Arteries and veins histology

This tutorial by Nicole from Kenhub explores the histology of arteries and veins, detailing their structure and function. It covers the layers of blood vessels, including the tunica intima, media, and externa, and examines different types of arteries, capillaries, and veins. The video also discusses the vasa vasorum and introduces the clinical condition of atherosclerosis. By the end, viewers will understand the distinguishing features of blood vessels and their roles in the circulatory system.

What is the primary function of arteries in the circulatory system?

• To connect arterioles to venules

• To filter waste products from the blood

• To transport oxygenated blood away from the heart

• To carry deoxygenated blood to the heart

Which layer of a blood vessel is directly in contact with the blood?

• Tunica media

• Tunica externa

• Tunica intima

• Subendothelium

What is a distinguishing feature of the tunica media in arteries compared to veins?

• Presence of valves

• Larger lumen

• Thicker smooth muscle layer

• Thinner elastic fibers

Which type of artery is characterized by a high number of elastic fibers?

• Capillaries

• Muscular arteries

• Arterioles

• Elastic arteries

What is the primary role of arterioles in the circulatory system?

• To transport blood to the heart

• To control vascular resistance

• To connect veins to capillaries

• To filter blood

Which type of capillary is found in areas requiring extensive exchange of materials?

• Continuous capillaries

• Fenestrated capillaries

• Muscular capillaries

• Discontinuous capillaries

Where are discontinuous capillaries primarily located?

• Lungs

• Kidneys

• Liver

• Heart

What is a characteristic feature of venules when viewed under a microscope?

• Thin walls and irregular shape

• Presence of smooth muscle

• Symmetrical circular shape

• Thick walls

What is the function of the vasa vasorum?

• To supply blood to the heart

• To provide nutrients to larger blood vessels

• To connect arteries to veins

• To filter blood

What condition is characterized by the buildup of plaque in arteries?

• Thrombosis

• Varicose veins

• Atherosclerosis

• Hypertension