Veins and Circulatory System

What is the main function of veins?

• Carry oxygen to tissues

• Pump blood to the body

• Return blood to the heart

• Filter impurities from the blood

Which layer of the blood vessel wall is unique to veins and helps prevent backflow of blood?

• Tunica intima

• Tunica media

• Tunica externa

• Venous valve

In comparison to arteries, veins generally have:

• Thicker walls

• Smaller lumens

• Valves

• Higher pressure

What is the largest vein in the human body?

• Superior vena cava

• Inferior vena cava

• Pulmonary vein

• Coronary sinus

Veins are responsible for carrying:

• Oxygenated blood

• Deoxygenated blood

• Both oxygenated and deoxygenated blood

• Nutrients to tissues

Which of the following is NOT a major type of vein in the human body?

• Deep veins

• Superficial veins

• Cardiac veins

• Cortical veins

What color is the typical appearance of veins under the skin?

• Red

• Blue

• Green

• Yellow

Which veins are often used for blood donation and intravenous therapy?

• Radial veins

• Femoral veins

• Jugular veins

• Antecubital veins

What is the term for the network of small veins that connect capillaries to larger veins?

• Arterioles

• Venules

• Capillary bed

• Venous plexus

In the circulatory system, which veins carry oxygenated blood?

• Pulmonary veins

• Renal veins

• Hepatic veins

• Coronary veins