-which od the statement belos is TRUE about circulatory system?
A.arteries take blood back to the haert.
B.thw haert pums oxygenated blood throughout the body.
C.veins carry de-oxygenated blood only.
D.Oxygenated blood leaves the haert and travel to the lungs.
-During inhalation the lungs volume expands. what happen in the rib cage in this process?
A.Move upward and out wards.
B.Move up wards in straight line.
C.Remains in the same position.
D.Moves down.

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