Unit+1+Circulatory+System

**UNIT QUESTION** How does our life style affect our heart? **SIGNIFICANT CONCEPTS** - Describe the circulatory system as a system of tubes with a pump and valves to ensure one-way flow of blood - Describe the double circulation in terms of a low pressure circulation to the lungs and a high pressure circulation to the body tissues and relate these differences to the different functions of the two circuits  - Describe the structure of the heart including the muscular wall and septum, chambers, valves and associated blood vessels  - Describe the function of the heart in terms of muscular contraction and the working of the valves  - Investigate, state and explain the effect of physical activity on pulse rate  - Describe coronary heart disease in terms of the blockage of coronary arteries and state the possible causes (diet, stress and smoking) and preventive measures  - Name the main blood vessels to and from the heart, lungs, liver and kidney  - Describe the structure and functions of arteries, veins and capillaries  - Explain how structure and function are related in arteries, veins and capillaries  - Describe the transfer of materials between capillaries and tissue fluid  - Identify red and white blood cells as seen under the light microscope on prepared slides, and in diagrams and photomicrographs  - List the components of blood as red blood cells, white blood cells, platelets and plasma - State the functions of blood:
 * CIRCULATORY SYSTEM & HEART PROBLEMS **
 * red blood cells – haemoglobin and oxygen transport
 * white blood cells – phagocytosis and antibody formation
 * platelets – causing clotting (no details)
 * plasma – transport of blood cells, ions, soluble nutrients, hormones, carbon dioxide, urea and plasma proteins

- Describe the function of the lymphatic system in circulation of body fluids, and the production of lymphocytes - Describe the process of clotting (fibrinogen to fibrin only) **AREA OF INTERACTION: HEALTH AND SOCIAL EDUCATION**

In this unit you will gain insight into the circulator and lymphatic systems within the human body. You will also be encouraged to develop a better understanding of the possible medical conditions associated with the malfunctioning of these systems.

**CLASS RESOURCES** ** Powerpoint presentations **





**SUMMATIVE TASKS:** - **Lab investigation: Criteria D, E & F** Investigate the factors that affect the heart rate

You can find the task sheet for the lab here - **Unit test: Criteria C** End unit test **DURATION:** 3 weeks **Addiitional resources:** You can find below some links to animations and videos that you can benefit from for this unit:

= LINKS = =Blood flow through the heart=

=How the heart works = media type="youtube" key="kUQe6I6vv74" height="468" width="630" align="center"

== <span style="font-family: tahoma,verdana,arial,sans-serif;">The Cardiac Cycle: <span style="font-family: tahoma,verdana,arial,sans-serif; font-size: 18px;">Click here <span style="font-family: tahoma,verdana,arial,sans-serif;"> for the animation about the ventricular systole and diastole ==

Problems with the veins (VARICOSE VEINS)
media type="youtube" key="VPeXRCc8w24" height="408" width="728" align="center"

=<span style="background-color: transparent; color: #333333; font-family: arial,sans-serif; font-size: 22px;"> Electric Beats - Pacemakers and the Human Heart = media type="youtube" key="IR0nWe47eek" height="470" width="630" align="center"

**Click here COMPOSITION OF BLOOD**
= = = WHITE BLOOD CELLS: =

Phagocytosis

Lymphocytes
media type="youtube" key="Ys_V6FcYD5I" height="470" width="644" align="center"

media type="youtube" key="hsc_-NXolhE" height="439" width="644" align="center"

Blood clotting
media type="youtube" key="--bZUeb83uU" height="470" width="658" align="center"

**More about Lymphatic system**
media type="youtube" key="Q530H1WxtOw" height="408" width="728" align="center"

media type="youtube" key="Kh-XdNnTZUo" height="470" width="700" align="center"

STRUCTURE OF LYMPHATIC SYSTEM