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Science 7
Circulatory System
Hartman
 Heart – organ in the body that consists of _____________
muscle.
 The heart is made up of 4 _____________.
 The heart has _______________ - left and right.
 A thick, muscular wall called the ________________ divides
the heart.
 Each side of the heart has 2 ________________ _______________ and ______________.
 The ______________ is on the ____________ and
_____________ incoming blood.
 The ______________ is on the ___________ and ____________
the blood to either the lungs or to the body.
 The blood travels through _________________ called either
_______________ , _____________ or _________________.
 ________________ take blood Away from the heart.
 ________________ take blood into the heart.
 ________________ are where ___________________________
and are the smallest vessels in the body.
 The _______________ vessels take blood to and from the
lungs.
 The _______________ is the largest artery delivering oxygen
_____________ blood to the body.
 The _______________ is the largest vein delivering oxygen
_____________ blood to the heart.
 The ________________ causes the heart to contract by
sending an electric impulse to the muscle.
 As we physically exert ourselves, our heart reacts by
___________________.
 ________________ prevent blood from flowing backwards.
Our heart has 4 and our bigger veins also have them.
 The gases that are exchanged in the circulatory system
are ____________________ and _________________.
 The word Cardiovascular refers to
____________________________________________________.