Circulatory System Worksheets

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					Science Nine                                                              Unit 2—Your Living Body

                                  Sc i e n c e 9 -B i o l o g y
     Wo r k s h e e t 9 -2 —Ci r c u l a t o r y Sy s t e m H e a l t h a n d Ex c r e t i o n
                                             Name ___________________________________

                                             Due Date ________________________________

                                  10         Show Me                   Hand In

                                             Correct and Hand In Again By ______________

Read pages 185-189 of SP to help you answer the following questions:

1.     Name four general steps that can lead to a healthy heart:





2.     The three main illnesses of the circulatory system are __________________________,

       _________________________ and ________________________________________.

3.     If the heart’s own arteries (coronary arteries) are blocked, blood, which carries

       _________ and _____________________cannot reach the_________________ cells of the

       heart. If the blood supply is cut off for too long, what can happen to these cells? ________

       This whole process is called a __________________ ____________________.

4.     What determines how severe a heart attack is? _________________________________


5.     Can people sometimes recover from heart attacks? _____________.

Worksheet 9-2—Circulatory System Health & Excretion                                          Page 1
Science Nine                                                          Unit 2— Your Living Body

6.    What are two ways in which nicotine can damage the heart?



7.    The artery on the bottom of this picture is clogged with

      ___________________________________________ How does this

      affect the flow of blood through this artery? ___________________


      What is the name of this disease? Ath________________________

      If this was a coronary artery and it became completely plugged, what could happen to the

      person? _______________________________________________________ What could

      the person have done to prevent this artery from becoming clogged? _______________


8.    Describe two medical procedures that are sometimes used to lessen the dangers of having
      atherosclerosis in the coronary arteries.



      Do these procedures always prevent heart attacks for the long term? _____________

9.    What happens to cause a stroke? (See margin on page 186) _______________________


10.   Blood pressure tells you how much ______________ it takes to push your blood through

      your ___________________________. Is your blood pressure always the same? ________

      What factors can affect your blood pressure? _____________________________________

Worksheet 9-2— Circulatory System Health & Excretion                                      Page 2
Science Nine                                                             Unit 2— Your Living Body

11.   When a person’s circulatory system is healthy, the blood pressure is generally

      (low/high) ____________ and after rising during exertion it returns to normal quite

      (slowly/quickly) _______________. Is it healthy to have the blood pressure too low?

      _____________________. Suggest something that could result in blood pressure being too

      low! ________________________________________________________________

12.   What is the definition of high blood pressure? __________________________________


13.   What can happen to smaller capillaries and arteries if the blood pressure is too high?

      ____________________________________________________. What organs could be

      damaged as a result of high blood pressure? _____________________________________

      Does atherosclerosis (clogging of arteries) increase the blood pressure? ______________

      As well as too much fat, too much _____________ in the diet can also cause high blood

14.   At what general age can diseases of the circulatory system start? ____________________

15.   It has been shown that regular exercise increases the ______________________________

      and the ____________________ of blood vessels that supply the heart. Exercise also

      _______________________ the heart muscle.

16.   Not _____________________ and reducing __________________ in your life helps your
      circulatory system.

17.   Can the tendency to have circulatory system disease be genetic (inherited) ___________

      If you have a high incidence of heart disease in your family, does it guarantee that you will

      have the disease? ______________. Can you decrease your chances? ________________

18.   High __________________ and _____________________ in the diet are the main
      contributing factors to circulatory system disease.

Worksheet 9-2— Circulatory System Health & Excretion                                        Page 3
Science Nine                                                           Unit 2— Your Living Body

19.   The organ called the ______________________ and the __________________system act
      like “traffic control” in your body.

20.   Your liver is found on the ______________ side of your chest cavity. Can any substances

      that enter your blood bypass the liver? _______________________________

21.   Carbohydrates that you don’t need right away for energy are changed into

      ________________ and _____________ by your liver. These provide a way for your body

      to _____________________ energy.

22.   Harmful substances produced by your body (like ammonia) or ingested into your body, like

      alcohol or drugs are _____________________ by your liver to less harmful forms. Too
      much alcohol or certain drugs (eg. Tylenol) can damage your liver by overworking it.
      When the liver become swollen and full of fat tissue and does not work well any more, this

      condition is called ______________________ of the liver. A viral disease that can affect

      the liver is _________________________. The “C” strain of this disease causes permanent

      damage to the liver and most often leads to premature death. How can this virus be passed

      from one person to another? ________________________________________________

23.   In the liver, ___________ blood cells are destroyed and used to make __________, which

      helps us digest fats. Iron is recycled into new ______________ ____________ cells.

24.   Label the parts and their functions on the following diagram:

Worksheet 9-2— Circulatory System Health & Excretion                                       Page 4
Science Nine                                                       Unit 2— Your Living Body

25.   How does the water help remove excess salt and urea from the body? ______________


26.   Excretion is the process of removing excess _________________, _________________

      and ____________________ from the body.

27.   Name five organs that are part of your excretory system ____________________________


28.   The main function of the kidneys is to ________________________ the blood. Wastes,

      excess____________________ and ___________________ pass through the kidney’s

      filtering system and form a liquid called _______________________.

29.   Why is it good that the urinary bladder is able to stretch? _________________________


30.   What happens at the urethra? _______________________________________________


Worksheet 9-2— Circulatory System Health & Excretion                                 Page 5

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