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Anatomy > Lymphatic System > Flashcards

Lymphatic System Flashcards

1
Q

lymphoid tissue location

A
  • abdomen

- pharynx

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2
Q

lymph composition

A
  • plasma
  • plasma proteins
  • lipids
  • lymphocytes
  • miscellaneous debris (bacteria, malignant cells)
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3
Q

lymph function

A
  • assists cardiovascular system in removal and transport of tissue fluid from extracellular spaces of body
  • major role in the immunological defenses of the body against bacteria and viruses
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4
Q

lymphatic vessels location

A
  • widely distributed throughout the body

- run alongside the blood vessels within the loose CT

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5
Q

lymphatic vessels structural characteristics

A
  • varies in size

- anastomose

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6
Q

define amastomose

A

-joins each other forming a network

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7
Q

structural characteristics components

A
  • lymphatic capillaries
  • medium ducts
  • lymphatic ducts
  • lacteals
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8
Q

lymphatic capillaries

A
  • begins to blind-ended tubes
  • small thin walled
  • very permeable
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9
Q

medium-large lymphatic vessels

A
  • thicker walls
  • smooth muscle fibers surround vessel
  • have valves: permit fluid to flow in one direction only
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10
Q

what are lymphatic ducts?

A
  • largest lymphatic ducts

- thicker walls, valves

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11
Q

lymphatic ducts components

A
  • right lymphatic duct

- thoracic duct

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12
Q

lacteal location

A

-located in intestine

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13
Q

lacteal function

A

-transports products of fat digestion

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14
Q

what are lymph nodes?

A

-small, oval, aggregations or clusters of lymphoid tissue

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15
Q

lymph nodes location

A
  • along the path of the lymphatic vessels
  • throughout the body
  • large clusters in cervical, axillary and inguinal regions
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16
Q

lymph nodes function

A
  • filtration

- production of lymphocytes

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17
Q

lymph node filtration function

A
  • filtration of lymph

- ->removal of foreign particles

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18
Q

lymph node production of lymphocytes function

A

-produces T-cells and B-cells

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19
Q

T-cells function

A

-destroys foreign material

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20
Q

B-cells function

A

-produces antibodies

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21
Q

lymph node structure

A
  • enclosed in a fibrous capsule
  • afferent vessels
  • efferent vessels
  • reticular fibers
  • macrophages
  • aggregations of T cells
  • germinal centers
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22
Q

afferent vessels function

A

-brings lymph to node

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23
Q

efferent vessels function

A

-takes filtered lymph away from the node

24
Q

reticular fibers function

A

-form a meshwork which traps debris

25
Q

macrophages function

A

-engulfs and digests debris

26
Q

germinal centers function

A

-area when B-lymphocytes develop and become plasma cells which produce antibodies

27
Q

path of the transport of lymph**

A

(in order)

  • tissue
  • lymphatic capillaries
  • large lymphatic vessels
  • lymphatic ducts
  • venous system
28
Q

right lymphatic duct**

A
  • drains upper right quadrant of the body

- empties its contents into the right subclavian vein

29
Q

thoracic duct**

A
  • drains lymph from lower extremities, abdomen, left thorax, left head, and neck
  • empties into the left subclavian vein
30
Q

what results from lymph not having an elaborate pump to push fluid towards its destination?

A

-must travel upward (against the force of gravity using different factors

31
Q

what factors frontol the flow of lymph

A
  • rhythmic contraction of skeletal muscles and smooth muscle of abdominal organs
  • negative pressure in thorax
  • valves
32
Q

how do muscles control lymph flow?

A

-they massage the vessels and help ush fluid along

33
Q

how do negative pressure control lymph flow?

A

-helps draw fluid up through thoracic duct

34
Q

how do valves control lymph flow?

A

-prevents the backflow fo lymph

35
Q

which lymphoid organs don’t transport lymph but contain lymphoid tissue(aka lymphoid organs)?

A
  • spleen
  • thymus
  • tonsils
36
Q

importance of having lymphoid tissue

A
  • key role in body’s immunological defense mechanism

- makes them called lymphoid organs

37
Q

spleen location

A
  • upper left quadrant
  • posterolateral to stomach
  • level of 9th-11th ribs
38
Q

spleen structure/contents

A
  • red pulp
  • white pulp
  • reticular fibers
  • sinusoids
39
Q

spleen red pulp

A

-consists of blood flowing through a meshwork of fibers

40
Q

spleen white pulp

A

-clusters of lymphoid tissue

41
Q

spleen reticular fibers

A
  • meshwork of fibers

- traps debris passing through so macrophages can negluf it

42
Q

spleen sinusoids

A

-irregular passageways through which blood passes

43
Q

spleen function

A
  • production of blood cells
  • storage
  • filtration
  • immune function
44
Q

production of blood cells splenic function

A
  • fetal life: all cell types

- adult: usually only lymphocytes

45
Q

storage splenic function

A
  • platelets
  • WBC and RBC
  • iron
46
Q

filtration splenic function**

A
  • filters blood

- destroys and disposes of old RBCs

47
Q

immune function splenic function

A

-production of lymphocytes and antibodies

48
Q

thymus location

A
  • bi-lobed mass of lymphoid tissue

- located beneath sternum

49
Q

thymus function

A
  • during prenatal and postnatal development, it’s responsible for production of T-lymphocytes (“trade school for T-lymphocytes”)
  • degenerates at puberty
50
Q

tonsils general location

A
  • clusters of lymphoid tissue

- deep to mucosa in 3 regions of pharnyx

51
Q

tonsils function

A
  • act as a barrier to infection (bc they contain lymphocytes)
  • this destroys foreign material (like bacteria) as they enter the system
52
Q

types of tonsils

A
  • lingual tonsils
  • pharyngeal tonsils (adenoids)
  • palatine tonsils
53
Q

lingual tonsil location

A

-located on posterior 1/3 of tongue

54
Q

pharyngeal tonsil location

A

-located on root of posterior wall of nasopharynx

55
Q

palatine tonsil location

A

-extend into soft palate on each side of oropharynx

Anatomy (41 decks)

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