| UNIT 3: The Circulatory System |
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Specific Objectives
Students should be able to:
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Explanatory notes
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1
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explain the need for a transport system in the human body;
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Limitations of simple diffusion; the relationship between surface area and volume.
(Link to Specific Objective A7)
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2
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identify the materials which need to be transported around the human body;
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3
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relate the structures of the heart to their functions; |
Chambers, valves and blood vessels of the heart (diagrams required),
pacemaker,
comparison of the differences in thickness of the right and left ventricles.
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4
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describe the structure and function of the heart; |
The role of the heart as a double pump.
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| 5. |
explain the concept of blood pressure; |
systole and diastole.
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| 6. |
describe the structure and function of the circulatory system in humans; |
Pulmonary vs systemic circulation. |
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relate the components of the blood to its function;
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Plasma, serum, red blood cells, white blood cells, platelets. |
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relate the structures of the arteries, veins and capillaries to their functions; |
Diagrams required; thickness of walls, size of lumen, presence or absence of valves.
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| 9. |
relate the structures of red blood cells, phagocytes and lymphocytes to their functions; |
Diagrams required.
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| 10. |
explain the process and the importance of blood clotting; |
Role of platelets fibrinogen, calcuim ions, thrombin in blood clotting.
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| 11. |
explain the causes and effects of heart attacks; |
Include hypertension (high blood pressure) atherosclerosis, coronary thrombosis, artificial pacemaker.
Interpretation of data.
(Link to Specific Objective D6)
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| 12. |
use tables, charts and graphs to represent data on the circulatory system.
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| 13. |
describe the structure and function of the lymphatic system; |
Role of tissue fluid and lymph;
location and function of lymph nodes.
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| 14. |
Describe how tissue fluid and lymph are formed. |
Diagram required. |
human and social biology
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