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27 terms

Lymphatic System

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Give two examples of how lymphatic capillaries are different from blood capillaries
Lymphatic capillaries are more permeable and are "dead end" structures
anything that prevents the normal return of lymph to the blood results in short-term___
Edema
__L of fluid remains behind in the tissue spaces
3
The___cells and___cells are essential in the body's defense mechanisms
Phagocyte, lymphocyte
The fluid found in blood is called___. The fluid found in lymphatic vessel s is called___.
plasma, lymph
What lymphoid organ has lymph circulating through it?
lymph node
what vessel brings lymph into a lymph node?
afferent
what is the outer region of the lymph node? What is the inner region?
cortex, medulla
What two types of cells can lymphocytes become?
T cells, B cells
What is the purpose of macrophages in the lymph nodes?
Phagocytosis and activation of immune response
Why is the spleen prone to rupture?
because it is surrounded by a thin capsule
Where is your thymus located?
below your tonsils
Where is your spleen located?
in your upper left quadrant of your abdominal cavity, behind your stomach
What lymphatic organ does not directly fight pathogens?
thymus
The __ is the largest lymphatic organ. It filters___.
spleen, blood
The ___ are located around the pharynx and are considered this type of lymphatic tissue
Tonsils, lymphatic nodules
What are the cardinal signs of inflammation?
redness, swelling, pain, heat
What are the two types of defense systems or immunity?
Non-specific (innate) and Specific ( adaptive)
What does the immune system do?
protects the body from infectious microorganisms
What is the body's first line of defense?
skin and mucous membranes
What is the body's second line of defense?
inflammation, phagocytes, antimicrobial proteins
What is the largest and most effective phagocytic cell?
Macrophage
What two events can trigger inflammation?
trauma, infection
What is pus comprised of?
A mix of dead or dying neutrophils, tissue cells and dead pathogens
What causes an inflamed area to become red and hot?
Dilated vessels (capillaries) cause more blood to rush through that area.
Name two places where lysosomal (anti-bacterial) enzymes are located
lacrimal fluid and salvia
Lymphatic collecting vessels contain __ to prevent the back flow of fluid
valves