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Anatomy > Unit 13 - Lymphatic System > Flashcards

Unit 13 - Lymphatic System Flashcards

1
Q

Lymphatic system consists of

A
  • one way network of lymphatic vessels that collect approximately. 10% of the ECF that leaked out from cardiovascular capillaries and return this fluid to the venous blood
  • lymph nodes along the vessel network that cleanse lymph as it passes through them
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2
Q

What support the functions of the lymphatic system

A
  • lymphoid cells
  • tissues
  • organs
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3
Q

ICF

A
  • intracellular fluid
  • fluid found within cells
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4
Q

ECF

A
  • fluid found outside of cells
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5
Q

Blood plasma

A
  • ECF
  • fluid in blood
  • some exits capillaries to for ISF (interstitial fluid)
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6
Q

ISF

A
  • interstitial fluid
  • fluid between cells within the body (except blood cells which are surrounded by plasma)
  • some moves into lymphatic capillaries to form lymph
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7
Q

Lymph

A
  • approx. 1% of body weight
  • fluid inside lymphatic system
  • returned to blood plasma
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8
Q

Lymphatic circulation

A

Write out on whiteboard page 78 of notes

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9
Q

Lymphatic capillaries

A

Closed ended vessels that project into cardiovascular capillary beds
- lymphatic capillaries in the small intestine also play a role in fat absorption

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10
Q

What filters lymph

A

Lymph nodes along collecting vessels filter lymph (bacteria debris)

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11
Q

Where do lymphatic capillaries transport lymph fluid away from tissue to

A
  1. Right lymphatic duct
  2. Thoracic duct
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12
Q

Right lymphatic duct

A
  • lymph from the right side of the head, chest and arm
  • drains into right subclavian vein re-entering circulation
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13
Q

Thoracic duct

A
  • lymph from below the ribs and the entire left side of body
  • collecting vessels form below the ribs converge to an enlarged lymph vessel (cisterna chyli- most inferior portion of the duct)
  • the thoracic duct drains into the left subcalvian vein reentering blood circulation
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14
Q

Summary of lymphatic circulation

A

One way route back to blood

Lymphatic capillaries - lymphatic collecting vessels (with valves) - lymphatic ducts - subclavian veins

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15
Q

Lymphoid tissues and organs contain

A

Many lymphocytes and play a key role in the body’s immune system

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16
Q

Primary lymphoid organs and tissues are the locations for what?

A
  • where lymphoid stem cells divide and mature (become immunocompetent)
  • includes:
    1. Red bone marrow
    2. Thymus gland
17
Q

Where do mature lymphocytes go

A

Move into bloodstream and migrate to the secondary lymphoid organs/tissues

18
Q

Red bone marrow

A
  • all lymphocytes stem cells arise here
  • site of B lymphocyte proliferation (mitosis) maturation
19
Q

Thymus gland

A
  • early in development (fetal stage) lymphocyte stem cells migrate here
  • site of T lymphocyte proliferation (mitosis) and maturation
20
Q

Secondary lymphoid organs and tissues

A
  • where lymphocytes detect and remove pathogens
  • locations where lymphocytes are activated and proliferate further
21
Q

Secondary lymphoid organs and tissues include

A
  1. Lymph nodes
  2. Spleen
  3. Mucosal associated lymphoid tissue (MALT)
22
Q

What are lymph nodes

A

Small masses of lymphoid tissue along lymphatic collecting vessels

23
Q

Where are high concentrations of lymph nodes located

A
  • cervical (neck)
  • axillary (armpit)
  • inguinal (groin)
  • intestinal
  • pelvic regions
24
Q

Where is the spleen located

A

In the left side of abdominal cavity just below diaphragm next to stomach

25
Q

What does the spleen do

A

Filters (cleans) blood by removing pathogens, old and defective blood cells and cellular debris

26
Q

Pathogens

A

Organisms that can cause disease like bacteria or viruses

27
Q

Mucosal associated lymphoid tissue (MALT)

A
  • trap and remove pathogens at points of entry into body
  • includes tonsils, appendix, and other lymphoid tissues on mucous membranes
  • ex. Aggregated lymphoid nodules in the small intestine
28
Q

Tonsils

A
  • example of MALT
  • form a ring around the pharynx
    1. Pharyngeal (1)- in posterior nasopharynx (referred to adenoids when infected/swollen)
    2. Palatine (2)- in oropharynx (used to be commonly removed)
    3. Lingual (1)- bumpy nodules on posterior part (base) of tongue

Anatomy (17 decks)

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