Why is a circulatory system needed?
Functions of circulatory system
Components of the Circulatory System
The structure of the heart
How the heart works
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View the video then answer the following questions:
1. Name the four chambers of the heart 2. How many valves control the flow of blood in the heart? Name them. 3. Why does blood flow to the lungs? 4. What is meant by systole? 5. Name the blood vessel that supplies the heart muscle with blood. |
Double Circulatory System
The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice: the pulmonary circuit is between the heart and lungs. the systemic circuit is between the heart and the other organs.
Blood
Structure of Blood Vessels
Pacemaker of the heart
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Blood Clotting
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Can you put the following stages of blood clotting in order from 1 to 6? protein fibrinogen ___ enzyme thrombin ___ protein prothrombin ___ protein fibrin ___ platelets activated ___ enzyme thrombokinase ___ |
Atherosclerosis
Heart Attack
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The Lymphatic System
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View the video then answer the following questions: 1. How is lymph formed? 2. What structure keeps the lymph from flowing backwards? 3. What happens in lymph nodes? 4. Name two organs associated with the lymphatic system. |
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Describe two ways in which the body benefits from exercise.
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