I WONDER - How Do Our Veins Control Our Blood Flow?

The video explains the role of valves in veins, ensuring blood flows in one direction. Valves act like doors, opening to let blood through and closing to prevent backflow. If valves malfunction, the heart must work harder to circulate blood.

What is the primary function of valves inside veins?

• To store blood temporarily

• To decrease heart rate

• To ensure blood flows in one direction

• To increase blood pressure

How do valves in veins operate to manage blood flow?

• They close to stop blood from entering the veins

• They remain open at all times

• They open to let blood through and close to prevent backflow

• They open and close randomly

What analogy is used to describe the function of valves in veins?

• They are like windows

• They are like doors

• They are like filters

• They are like pumps

What happens if the valves in veins do not function properly?

• The blood pressure decreases

• The veins become larger

• The heart has to work harder

• The blood flows more efficiently

What is a potential consequence of valves not closing properly?

• Heart rate decreases

• Blood pressure increases

• Blood flows faster

• Blood flows backward