Lymphatic system Flashcards

1
Q

Breifly describe the Lymphatic system:

A

-appart of the immune system and its made of a network of vessles called lymph vessles that carry lymph fluid UP to the heart unidirectionally

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2
Q

Lymph fluid

A

A clear fluid that started off as blood plasma which will eventually make its way back to venous return as blood plasma again

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3
Q

Where does lymph fluid come from?

*two fates

A

-Started off as blood plasma!
-when plasma leaks out of capillaries it has two fates…

1.90% of the fluod that leaks out undergoes gas/nutrient exhange and returns to capillaries as blood

2.10% of fluid that leaks out becomes trapped and becomes LYMPH FLUID!!

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4
Q

Lymph capilllaries

A

-the way that lymph leaves body tissues
-most are superficial in the skin but some are deep
-creates a mesh like structure of tubes

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5
Q

Lacteal

A

-A specialized type of lymph capillary that is found inside villi of small intestine and large inteatine (mostly in small intestine though)

-transports LIPIDS as they get absorbed in intestinal wall

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6
Q

Lymph vessles

A

-goal of lymph vessles is to return lymph fluid back to heart

-start off as a col-de-sac structure

-have large diameter to hold fluid

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7
Q

What are the walls of lymph vessles like?

A

They are thin with a irregular shape that are more similar to veins that arteries. They have a tunia externa

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8
Q

what is the flow of lymph fluid controlled by?

A

based of lymph fluid volume!

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9
Q

lymphatic vessles are seperatred into functional units called _____?

A

lymphogions

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10
Q

Lymphgions

A

functional units that have smooth muscle and one-way valves to help move lymph to heart

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11
Q

What is a lymph node?
How many do we have?

A

-a small,spherical structure that house lymphocytes (mature B and T cells) and macropgaes

-filter lymph fluid before it returns to circulatory system

-we have about 600-700 in our body!!

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12
Q

if there is an infection in our body do lymph nodes get smaller or bigger?

A

they get bigger due to Lymphocyte action

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13
Q

Lymph only flows _____ through the body traveling from the extremities through the body to the ____

A

Lymph only flows UPWARD through the body traveling from the extremities through the body to the NECK

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14
Q

How is lymph flow seperated?

A

into two seperate and unequal drainage areas

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15
Q

The right Lymphatic duct drains how much of our lymph fluid?

A

25%

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16
Q

The thoracic duct/portal (left side) drains how much of our lymph fluid?

A

75%

17
Q

lymoh enters what vein and becomes what as it enters venous circulation?

A

It enters the subclavian vein toward the neck and then becomes plasma in venous circulation

18
Q

Bone marrow

A

Makes red blood cells, white blood cells (including lymphocyets and macrophages)

19
Q

Tonsils

A

the bodies first line of defense against inhaled or ingested pathogens

20
Q

Thymus gland

A

A gland that secretes thymosin which natures T cells to teach them what to look for and attack to help immune system

21
Q

Spleen

A

helps purify the blood that passes through it by removing bacteria and old RBCs

22
Q

Appendix

A

-connected to the LI that is rich in lyphocyes and may help antibody production