1. Construct Interactive Notes
(last one of the year!)
• 5 pages of binder paper
• On cover, write:
Chapter 14: Lymphatic and Immune Systems
Name, period, seat #
• Number the pages

2. Lymphatic System (pg 2)

3. Lymphatic System (pg 2)
• Consists of lymphatic vessels and lymphoid
organs

4. Lymphatic System (pg 2)
• Consists of lymphatic vessels and lymphoid
organs
• Functions: returns excess interstitial fluid to
the blood, absorbs fat and fat-soluble vitamins
from the digestive system, defends against
disease by filtering out microorganisms

5. Lymph
• A fluid similar in composition to blood plasma

6. Lymph
• A fluid similar in composition to blood plasma
• When blood passes through capillaries,
plasma leaks out, becoming interstitial
(“between the cells”) fluid

7. Lymph
• A fluid similar in composition to blood plasma
• When blood passes through capillaries,
plasma leaks out, becoming interstitial
(“between the cells”) fluid
• This fluid needs to be returned to the blood or
it will accumulate in the tissues, causing
edema

8. Lymph
• A fluid similar in composition to blood plasma
• When blood passes through capillaries,
plasma leaks out, becoming interstitial
(“between the cells”) fluid
• This fluid needs to be returned to the blood or
it will accumulate in the tissues, causing
edema
• Once the interstitial fluid enters the lymph
capillaries, it is called lymph

9. Lymphatic Vessels
• Carry fluid only in one direction (away from
the tissues, toward the heart). Like veins, they
have valves that prevent backflow.

10. Lymphatic Vessels
• Carry fluid only in one direction (away from
the tissues, toward the heart). Like veins, they
have valves that prevent backflow.
• Lymph capillaries: smallest lymphatic vessels.

11. Lymphatic Vessels
• Carry fluid only in one direction (away from
the tissues, toward the heart). Like veins, they
have valves that prevent backflow.
• Lymph capillaries: smallest lymphatic vessels.
• Capillaries merge to form lymphatic vessels,
which merge into lymphatic trunks, which lead
to the two lymphatic ducts

12. Lymphatic Vessels
• Carry fluid only in one direction (away from
the tissues, toward the heart). Like veins, they
have valves that prevent backflow.
• Lymph capillaries: smallest lymphatic vessels.
• Capillaries merge to form lymphatic vessels,
which merge into lymphatic trunks, which lead
to the two lymphatic ducts
• Right lymphatic duct drains the upper right
quadrant of the body. Thoracic duct drains
remaining ¾ of body.

13. Lymphatic Vessels
• Carry fluid only in one direction (away from the
tissues, toward the heart). Like veins, they have
valves that prevent backflow.
• Lymph capillaries: smallest lymphatic vessels.
• Capillaries merge to form lymphatic vessels,
which merge into lymphatic trunks, which lead to
the two lymphatic ducts
• Right lymphatic duct drains the upper right
quadrant of the body. Thoracic duct drains
remaining ¾ of body.
• Both ducts empty into the subclavian vein

14. Lymphatic Organs
1. Lymph nodes

15. Lymphatic Organs
1. Lymph nodes
– small, bean shaped structures

16. Lymphatic Organs
1. Lymph nodes:
– small, bean shaped structures
– Widely distributed throughout the body along the
lymphatic pathways

17. Lymphatic Organs
1. Lymph nodes:
– small, bean shaped structures
– Widely distributed throughout the body along the
lymphatic pathways
– Most numerous in the neck, armpit, and groin

18. Lymphatic Organs
1. Lymph nodes:
– small, bean shaped structures
– Widely distributed throughout the body along the
lymphatic pathways
– Most numerous in the neck, armpit, and groin
– Function: Filter the lymph

19. Lymphatic Organs
1. Lymph nodes:
– small, bean shaped structures
– Widely distributed throughout the body along the
lymphatic pathways
– Most numerous in the neck, armpit, and groin
– Function: Filter the lymph
– Contain lymphocytes and macrophages, which
remove bacteria, viruses, cancer cells, and
damaged cells

20. 2. Tonsils

21. 2. Tonsils
–Clusters of lymphatic tissue

22. 2. Tonsils
–Clusters of lymphatic tissue
–3 pairs of tonsils (pharyngeal, palatine, and
lingual)

23. 2. Tonsils
–Clusters of lymphatic tissue
–3 pairs of tonsils (pharyngeal, palatine, and
lingual)
–Contain lymphocytes and macrophages,
which destroy pathogens that enter
through the nose or mouth

24. 3. Spleen
–Largest lymphatic organ

25. 3. Spleen
–Largest lymphatic organ
–Curves around the left side of the stomach

26. 3. Spleen
–Largest lymphatic organ
–Curves around the left side of the stomach
–Filters the blood (in the same way the
lymph nodes filter the lymph)

27. 3. Spleen
–Largest lymphatic organ
–Curves around the left side of the stomach
–Filters the blood (in the same way the
lymph nodes filter the lymph)
–Acts as a reservoir for blood

28. 4. Thymus
–Gland located behind the sternum

29. 4. Thymus
–Gland located behind the sternum
–Involved in maturation of T-lymphocytes

30. 4. Thymus
–Gland located behind the sternum
–Involved in maturation of T-lymphocytes
–Produces the hormone thymosin

31. Diagram (pg 3)
• Label as a class