What are the two types of veins?
Your body consists of two types of veins. The pulmonary and systemic vein.

Pulmonary veins: Pulmonary veins are major blood channels that transport oxygenated blood from the lungs to the rest of the body. The pulmonary circuit carries deoxygenated blood from your heart to your lungs.
Systemic veins: The systemic circuit transports deoxygenated blood back to the heart, which is oxygenated via the pulmonary.

Venous System: Vein Anatomy and Function, Vein Types, Conditions

https://www.healthline.com/health/venous-system

Your venous system is a network of veins that carry blood back to your heart from other organs. We’ll explain the basic structure of a vein before diving into different types of veins and their functions. Explore the venous system with an interactive diagram and learn some tips for improving the health of your veins.