The Lymphatic System

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what are the main parts of the lymphatic system?
lymph fluid, lymph capillaries & vessels & ducts, lymph nodes
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what are the functions of the lymphatic system?
tissue fluid drainage, protection against disease, transport of fats
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what does tissue fluid drainage do?
drains excess plasma from the tissues/distributes fluid in the body.
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what is the lymph fluid?
formed from excess tissue fluid, which is drained into the lymph capilleries.
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what is the composition of lymph?
similar to blood plasma but contains more white blood cells, fat absorbed from the small intestine.
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what happens in the lymph vessels?
lymph is squeezed along the lymph vessels by muscle contraction, back flow is prevented by valves.
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then where does the lymph go?
it eventually gets emptied into large lymphatic ducts which drain into the blood in the subclavian veins.
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what are the lymph nodes?
they occur along the lymph vessels and contain many infection fighting white blood cells called monocytes and lymphocytes
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how does the lymph enter the lymph node?
via an afferent vessel and exits via an efferent vessel
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what does the lymph node do before the blood is drained back into the blood stream?
they filter and clean the blood
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what do lymph nodes do in response to infection?
they swell up e.g. cervical nodes in the neck
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label the diagram of the lymph nodes on the dog
label all correctly with labels spelt correctly
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label diagram of a lymph node
CORRECTLY
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what are the 2 main types of lymphocytes that are found in the lymphatic system?
T lymphocytes and B lymphocytes
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what do T-lymphocytes do?
attack pathogens directly
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what do B lymphoctyes do?
produce antibodies which immobalise pathogens
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what are the rwst of the lymphatic organs and tissues in the animal body?
Spleen, bone marrow, Thymus, Tonsils, Adenoids, Peyer's patches
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what does the spleen do?
it acts as a filter for blood as part of the immune sytsem, recycles old red blood cells, platlets and white blood cells are stored there.
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what does the bone marrow do?
prduces cells and stores fat
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what does the thymus do?
where T-lymphocytes or T cells develop and mature.
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what are the tonsils responsible for?
they sample the bacteria that comes through the nose or mouth.
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what is the adenoids?
they react to foriegn invaders in the body in the nasal cavity.
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what does the peyer's patches do?
tey monitor intestinal bacteria and make sure pathogenic bacteria dont grow in the intestines
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Other cards in this set

Card 2

Front

what are the functions of the lymphatic system?

Back

tissue fluid drainage, protection against disease, transport of fats

Card 3

Front

what does tissue fluid drainage do?

Back

Preview of the front of card 3

Card 4

Front

what is the lymph fluid?

Back

Preview of the front of card 4

Card 5

Front

what is the composition of lymph?

Back

Preview of the front of card 5
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