BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS
BLOOD
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
These have structures that prevent backflow of blood
|
|
arteries
|
|
|
veins
|
|
|
Either A or B
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Venous valves are especially important in the arms and legs, where they prevent the backflow of blood in response to the pull of gravity.
There is 1 question to complete.