Top Posters
Since Sunday
g
3
3
2
J
2
p
2
m
2
h
2
s
2
r
2
d
2
l
2
a
2
SlideshowReport

Countercurrent heat exchange.

Description
(a) Countercurrent exchange retains heat in the leg of an endotherm, such as this egret. Arrows in vessels indicate direction of blood flow. (b) An SEM of the arrangement of veins surrounding an artery in a bird's leg. The artery is almost completely covered by overlying veins, allowing efficient heat exchange between the vessels.
Related Images
Add Comment
Explore
Post your homework questions and get free online help from our incredible volunteers
  1160 People Browsing
 144 Signed Up Today
Your Opinion
Who's your favorite biologist?
Votes: 586

Previous poll results: How often do you eat-out per week?