What 3 key factors about veins?

Key Factors About Veins:

1. Valves: Veins contain one-way valves that help prevent backward flow of blood. These valves are crucial in maintaining blood flow towards the heart against gravity.

2. Thin walls: Veins have thinner walls compared to arteries. The thinner walls of veins allow for greater distensibility, which helps regulate blood flow and accommodate varying blood volumes.

3. Low pressure: Blood pressure in veins is generally lower than in arteries. This lower pressure aids in the return of blood to the heart, assisted by the pumping action of skeletal muscles and the respiratory system.