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Eighth Grade (Grade 8) Circulatory and Immune Systems Questions

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Grade 8 Circulatory and Immune Systems
Grade 8 Circulatory and Immune Systems
Grade 8 Circulatory and Immune Systems
The circulatory system is also known as the                         cardiovascular system                        .

The circulatory system contains the         heart         and                  blood vessels                   and also the             arteries             ,         veins         and the                capillaries                .

The pulmonary circulation is a short circulation from the         heart         to the         lungs         and back.

The heart is an organ that beats around             3 billion             times in a           70-year           lifetime.

It usually beats          60-100          times per          minute         .

The heart is a muscle around the size of your        fist       .

It is located in the          center          of your         chest         but slightly more to the        left       .

The heart gets            messages            from the body telling it to pump either        more        or less         blood         when it is needed.

Our         blood         is pumped by our          hearts         .

Our blood travels through lots of miles of                 blood vessels                 in our bodies, our blood also carries             nutrients            , water,          oxygen          and                  waste products                  to and from our body         cells        .

Blood is made up of other liquids,          solids          and a bit of          oxygen          and                  carbon dioxide                 .
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