Structure of Veins Video Lessons

Video Thumbnail

Concept

Problem: Which of the following mechanisms help blood fight gravity so that, for instance, it can return from blood vessels in your feet back into your heart? (there may be more than one answer)Select one or more:a. breathing allows the pressure in your chest to decrease and allow blood to flow up towards your heartb. as you walk, the skeletal muscles in your legs contract and squeeze the veins; since veins have valves, blood flows up and doesn't backflow back downc. the force of blood flowing out of the heart and into the arteries pushes all of the blood along, causing blood to return to the heartd. precapillary sphincters open to allow blood to flow back towards the heart

FREE Expert Solution

Structure of Blood Vessels: 

View Complete Written Solution
Problem Details

Which of the following mechanisms help blood fight gravity so that, for instance, it can return from blood vessels in your feet back into your heart? (there may be more than one answer)

Select one or more:

a. breathing allows the pressure in your chest to decrease and allow blood to flow up towards your heart

b. as you walk, the skeletal muscles in your legs contract and squeeze the veins; since veins have valves, blood flows up and doesn't backflow back down

c. the force of blood flowing out of the heart and into the arteries pushes all of the blood along, causing blood to return to the heart

d. precapillary sphincters open to allow blood to flow back towards the heart

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Structure of Veins concept. You can view video lessons to learn Structure of Veins. Or if you need more Structure of Veins practice, you can also practice Structure of Veins practice problems.