Give reasons for following
1. Why veins contain valves whereas arteries do not have?
2. WBC has a main role to play in providing immunity to body.
3. Double circulation is required for higher organisms. Why?
Answers
Answered by
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1) valves are present to prevent the backflow of blood in the veins
261202:
Can you pl answer other questions also
2)the main function of wbcs is to protect us from disease causing germs i.e. provide immunity to the body. This is done in two ways- (a) some wbcs surround the germs, ingest and digest them, and (b) some other wbcs produce special chemicals called antibodies which destroy the germs.
idk the third..
It's ok but thanks for answering rest two questions
Answered by
2
Veins contain walls to prevent the back flow of blood where as arteries do not have
WBC has a main function in immunity as it fights germs
So that Carbon mixed blood and oxygen blood doesn't mix together
WBC has a main function in immunity as it fights germs
So that Carbon mixed blood and oxygen blood doesn't mix together
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