Circulatory System Blood Vessel Functions

This tutorial introduces blood vessels, a key component of the circulatory system. It explains their functions, including transporting blood, nutrients, and oxygen, and removing waste. The tutorial details the types of blood vessels: arteries, arterioles, capillaries, venules, and veins, and how each is adapted to its function. It highlights the role of veins and valves in maintaining blood flow and concludes with a preview of the next topic on blood components.

What is the primary role of blood vessels in the circulatory system?

• To store blood

• To carry blood to and from the heart

• To produce blood cells

• To filter blood

Which of the following is a function of blood vessels?

• Producing white blood cells

• Regulating body temperature

• Transporting oxygen and nutrients to tissues

• Storing excess blood

Which type of blood vessel carries oxygen-rich blood away from the heart?

• Venules

• Arteries

• Capillaries

• Veins

What is the main function of capillaries in the circulatory system?

• To regulate blood pressure

• To store blood

• To exchange nutrients and waste between blood and tissues

• To carry blood back to the heart

How are arteries adapted to handle high blood pressure?

• They have wide lumens

• They have thick and strong walls

• They have thin walls

• They contain valves

What characteristic of arterioles allows them to regulate blood flow?

• Their wide lumens

• Their thin walls

• Their presence of valves

• Their ability to change diameter

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

• To exchange gases with tissues

• To carry deoxygenated blood back to the heart

• To transport blood away from the heart

• To carry oxygen-rich blood

Why do veins have valves?

• To prevent backward flow of blood

• To produce blood cells

• To increase blood pressure

• To store blood

What happens to blood pressure as it moves from arteries to veins?

• It increases

• It remains constant

• It decreases

• It fluctuates

How do veins accommodate large volumes of blood?

• By having thin, less elastic walls

• By having narrow lumens

• By having thick walls

• By having multiple layers of muscle