Top Posters
Since Sunday
A
6
j
6
c
5
m
5
C
5
d
5
s
5
n
4
i
4
d
4
d
4
J
4
SlideshowReport

One-way valves.

Description
(a) In some veins, one-way valves assist the return of blood to the heart against the force of gravity. Valves are typically present in the limbs, as shown in this light micrograph of a leg vein with a closed valve directed towards the heart. (b) Comparison of what would happen to blood flow through a vein with and without valves.
Related Images
Add Comment
Explore
Post your homework questions and get free online help from our incredible volunteers
  884 People Browsing
Your Opinion
Where do you get your textbooks?
Votes: 422