What is a vein?

The video tutorial provides an overview of veins, arteries, and capillaries, explaining their roles in transporting nutrients and blood throughout the body. It highlights the structure and function of veins, including their thin walls and valves that prevent backflow. The tutorial also covers the role of capillaries in gas and nutrient exchange. The video concludes by encouraging viewers to explore more resources on Kenhub for a comprehensive understanding of human anatomy.

Which of the following is NOT one of the three main types of blood vessels?

• Arteries

• Nerves

• Veins

• Capillaries

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

• Exchange gases and nutrients

• Transport oxygen to tissues

• Carry blood towards the heart

• Carry blood away from the heart

Why do veins have valves?

• To prevent blood from flowing backwards

• To reduce blood flow

• To connect with arteries

• To increase blood pressure

What is the role of capillaries in the circulatory system?

• To pump blood

• To connect arteries and veins

• To store blood

• To filter blood

Where does the exchange of gases and nutrients primarily occur?

• In the heart

• In the capillaries

• In the veins

• In the arteries