The lymphatic system consists of lymphoid organs/tissues, lymphatic vessels (lymph capillaries, vessels, including the one-way valves), lymph, lymph nodes.
You shld know the followings:
1. How the interstitial fluid/tissue fluid is formed? Remember to include the high hydrostatic pressure!
2. The importance of IF?
3. How the lymph is formed?
4. The differences btw blood & lymph/IF.
5. What happens to the body parts if the lymph vessel is blocked?
6. What causes Elephantiasis/Lymphatic filariasis?
7. What are the functions of lymphatic system? The functions of lymph node?
8. How the lymph is returned back to the circulatory system? With the help of lymphatic valve and surrounding skeletal muscles.
9. Able to describe the pathway at which the lymph moves from the lymph cap. To the subclavian veins.
*refer to your notes/exercises to get the answers, if you still can’t, ask me during our lesson.
The formation of lymph
More pictures on Elephantiasis, click here.
Next, we shall look at our body’s defence mechanism, AIDS & CVD.
1. There are 3 lines of defence mechanisms in our body. First line & Second line of denfence being non-specific defence.
2. Second line of defence involves phagocytes (neutrophils & monocytes/macrophages) which can perform phagocytosis to kill & destroy invading pathogens.
3. Third line of defence is specific defence which involves the immune system where the lymphocytes produce antibodies.
4. You shld know what is antigen? Antibody?
5. The 4 different ways how antibody destroys the antigen. Remember L.O.A.N.
6. How the lymphatic system helps in the body’s defence mechanism.
7. The 4 different types of immunity. Active immunity? Passive immunity? Natural versus artificial? Including recognising the graphs.
8. Causes, transmission & prevention of AIDS. Click here.
9. CVD & steps to reduce the risk.
Second line of defence – Non-specific
Phagocytes carry out phagocytosis
Third line of defence - Specific Immunity
Lymphocytes producing Antibodies
Second line of defence – Non-specific
Phagocytes carry out phagocytosis
Third line of defence - Specific Immunity
Lymphocytes producing Antibodies
Immune system, WBC, T-Cells, Cancer cells
If you can understand half of the content in this video, you are in A-level now.
Do not get discouraged if you could not understand this video, it is because the T-helper cells, T-cell, Natural Killer cells, B cells, etc. are not part of your SPM syllabus & i did not cover this as well. But it is good to learn & know more about your own body!
If you can understand half of the content in this video, you are in A-level now.
Do not get discouraged if you could not understand this video, it is because the T-helper cells, T-cell, Natural Killer cells, B cells, etc. are not part of your SPM syllabus & i did not cover this as well. But it is good to learn & know more about your own body!
See you again.
