CXC CSEC exam guide: Human and Social Biology - Section B: Life Processes: Unit 3: The Circulatory System

CXC Human and Social Biology exam guide: Life processes Unit 3

CXC CSEC exam guide: Human and Social Biology


UNIT 3: The Circulatory System

Specific Objectives

Students should be able to:

Explanatory notes


explain the need for a transport system in the human body;

Limitations of simple diffusion; the relationship between surface area and volume.

(Link to Specific Objective A7)


identify the materials which need to be transported around the human body;


relate the structures of the heart to their functions; 

Chambers, valves and blood vessels of the heart (diagrams required),


comparison of the differences in thickness of the right and left ventricles.


describe the structure and function of the heart;

The role of the heart as a double pump.

5. explain the concept of blood pressure;

systole and diastole.

6. describe the structure and function of the circulatory system in humans; Pulmonary vs systemic circulation.

relate the components of the blood to its function;

Plasma, serum, red blood cells, white blood cells, platelets.
8. 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.

9. relate the structures of red blood cells, phagocytes and lymphocytes to their functions;

Diagrams required.

10. explain the process and the importance of blood clotting;

Role of platelets fibrinogen, calcuim ions, thrombin in blood clotting.

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)


use tables, charts and graphs to represent data on the circulatory system.

13. describe the structure and function of the lymphatic system;

Role of tissue fluid and lymph;

location and function of lymph nodes.

14. Describe how tissue fluid and lymph are formed. Diagram required.


Stacy (not verified) 21 November 2012 - 10:04pm

i hear the info tech cxc is always difficult.. just hope to pass all the subjects imma take

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