Chapter 27: The Lymphatic System Flashcards

1
Q

what is the primary transport system?

A

the circulatory system

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2
Q

what is the secondary transport system?

A

the lymphatic system

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3
Q

whats the four functions of the lymphatic system?

A

a one way system that collects and returns excess tissue fluid to the blood, defend against infection, destroys micro-organisms, absorbs and digests fats

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4
Q

what is tissue fluid?

A

blood plasma forced out of capilleries - contains no red blood cells or platelets
it surrounds the cells of the body and aids transportation of substances in and out of the cell

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5
Q

where does tissue fluid go?

A

90% returns back into capilleries, rest enters lymph vessels and becomes lymph (this fluid contains large amounts of WBCs proteins and fats

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6
Q

what are lymph vessels?

A

dead ending tubes

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7
Q

what moves lymph around the body?

A

muscular walls, body movements on vessels, lymph only moves in one direction

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8
Q

what are the two main vessels in the lymphatic system?

A

thoracic duct, right lymphatic duct.

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9
Q

where does lymph enter back into the bloodstream?

A

subclavian valves

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10
Q

what are lymph nodes?

A

swellings along lymph vessels, found in clusters around the body, they form glads

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11
Q

give three examples of the glands formed by lymph nodes.

A

tonsils, groin, neck, armpit, spleen

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12
Q

how does the lymphatic system defend against infection?

A

filters micro- organisms in lymph nodes, matures and stores lymphocytes (white blood cells)

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13
Q

how does the lymphatic system destroy micro- organisms?

A

engulfs and digests them, antibody production

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14
Q

what gives lymph a milky appearance?

A

the absorption of fats

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15
Q

what component of blood is closely associated with the lymphatic system?

A

white blood cells

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