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.

Explain how blood returns to the heart via the veins.

What happens to the blood in the capillaries before it enters the veins?