Anatomy > Lymphatic System > Flashcards

Lymphatic System Flashcards

(55 cards)

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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

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A

-takes filtered lymph away from the node

24
Q

reticular fibers function

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A

-form a meshwork which traps debris

25
macrophages function
-engulfs and digests debris
26
germinal centers function
-area when B-lymphocytes develop and become plasma cells which produce antibodies
27
path of the transport of lymph**
(in order) - tissue - lymphatic capillaries - large lymphatic vessels - lymphatic ducts - venous system
28
right lymphatic duct**
- drains upper right quadrant of the body | - empties its contents into the right subclavian vein
29
thoracic duct**
- drains lymph from lower extremities, abdomen, left thorax, left head, and neck - empties into the left subclavian vein
30
what results from lymph not having an elaborate pump to push fluid towards its destination?
-must travel upward (against the force of gravity using different factors
31
what factors frontol the flow of lymph
- rhythmic contraction of skeletal muscles and smooth muscle of abdominal organs - negative pressure in thorax - valves
32
how do muscles control lymph flow?
-they massage the vessels and help ush fluid along
33
how do negative pressure control lymph flow?
-helps draw fluid up through thoracic duct
34
how do valves control lymph flow?
-prevents the backflow fo lymph
35
which lymphoid organs don't transport lymph but contain lymphoid tissue(aka lymphoid organs)?
- spleen - thymus - tonsils
36
importance of having lymphoid tissue
- key role in body's immunological defense mechanism | - makes them called lymphoid organs
37
spleen location
- upper left quadrant - posterolateral to stomach - level of 9th-11th ribs
38
spleen structure/contents
- red pulp - white pulp - reticular fibers - sinusoids
39
spleen red pulp
-consists of blood flowing through a meshwork of fibers
40
spleen white pulp
-clusters of lymphoid tissue
41
spleen reticular fibers
- meshwork of fibers | - traps debris passing through so macrophages can negluf it
42
spleen sinusoids
-irregular passageways through which blood passes
43
spleen function
- production of blood cells - storage - filtration - immune function
44
production of blood cells splenic function
- fetal life: all cell types | - adult: usually only lymphocytes
45
storage splenic function
- platelets - WBC and RBC - iron
46
filtration splenic function**
- filters blood | - destroys and disposes of old RBCs
47
immune function splenic function
-production of lymphocytes and antibodies
48
thymus location
- bi-lobed mass of lymphoid tissue | - located beneath sternum
49
thymus function
- during prenatal and postnatal development, it's responsible for production of T-lymphocytes ("trade school for T-lymphocytes") - degenerates at puberty
50
tonsils general location
- clusters of lymphoid tissue | - deep to mucosa in 3 regions of pharnyx
51
tonsils function
- act as a barrier to infection (bc they contain lymphocytes) - this destroys foreign material (like bacteria) as they enter the system
52
types of tonsils
- lingual tonsils - pharyngeal tonsils (adenoids) - palatine tonsils
53
lingual tonsil location
-located on posterior 1/3 of tongue
54
pharyngeal tonsil location
-located on root of posterior wall of nasopharynx
55
palatine tonsil location
-extend into soft palate on each side of oropharynx
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