The document provides an overview of the lymphatic and immune systems, including their functions of transporting lymph fluid and fighting disease, the organs that make up these systems such as lymph nodes and the spleen, and medical terminology related to the lymphatic and immune systems like combining forms and suffixes used in medical terms.

1. LYMPHATIC AND IMMUNE
SYSTEM
Immunology
Medical Terminology for Healthcare Professionals
HSC 1531
Florida State College of Jacksonville
Professor: Michael Whitchurch, MHS

2. The Lymphatic and Immune Systems at a
Glance
 Functions of the Lymphatic System
 Network of vessels that picks up excess
tissue fluid, cleanses it, and returns it to
circulatory system
 Picks up fats absorbed by digestive system
 Functions of Immune System
 Fights disease and infections

3. The Lymphatic and Immune Systems at
a Glance
 Organs of the Lymphatic System
 Lymph nodes
 Lymphatic vessels
 Thymus gland
 Spleen
 Tonsils

5. Lymphatic & Immune Combining Forms
 adenoid/o  lymphaden/o
 adenoids  lymph node
 immun/o  lymphangi/o
 protection  lymph vessel
 lymph/o
 lymph

6. Lymphatic & Immune Combining Forms
 path/o  tonsill/o
 disease  tonsils
 splen/o  tox/o
 spleen  poison
 thym/o
 thymus

7. Lymphatic & ImmuneSuffixes
 –globulin
 protein

8. Anatomy and Physiology
 Network of:
 Lymphatic vessels
 Lymph nodes
 Spleen
 Thymus gland
 Tonsils
 Perform diverse functions

9. Lymphatic System Animation

10. Anatomy and Physiology – Lymphatic
System
First, removes excess tissue fluid
 Collects excess tissue fluid throughout
body
 Purifies it as it passes through system
 Returns it to circulatory system
 Lymph = fluid within lymphatic
vessels

11. Lymphatic vessels (green) pick up excess tissue fluid, purify it in
lymph nodes, and return it to the circulatory system.

12. Anatomy and Physiology – Lymphatic
System
Second, lymph vessels around the small
intestine assist with fat absorption
 Picks up absorbed fats
 Delivers to circulatory system
 These lymph vessels are called
lacteals

13. Anatomy and Physiology – Lymphatic
System
Third, lymphatic and immune systems work
together
 Form a group of cells, tissues, organs, &
molecules
 Body’s primary defense against pathogens
 Including foreign invaders and own cells that have
become diseased

14. Lymphatic Vessels
 Network of vessels throughout
body
 One-way pipes conducting lymph
from tissues toward thoracic
cavity
 Low pressure system
 Uses valves to prevent backflow

15. Photomicrograph of lymphatic vessel with valve clearly visible.
(Michael Abbey/Photo Researchers, Inc.)

16. Lymphatic Vessels
 Begin as very small lymph
capillaries in tissues
 Capillaries merge into larger lymph
vessels
 Finally drain into one of two large
lymphatic ducts in thoracic
cavity

17. Figure 6.9 – Location of lymph vessels, lymphatic ducts, and areas of
lymph node concentrations.

18. Lymph Nodes
 Also called
lymph glands
 Composed of lymphatic
tissue
 Located along route of
lymphatic vessels

19. Structure of a lymph node.

20. Lymph Nodes
 House lymphocytes and antibodies
 Remove pathogens and cell debris from
lymph as it passes through
 Trap and destroy cells from cancerous
tumors
Antibodies are produced by specialized B
Cells after stimulation by an antigen and
act against the antigen in an immune
response.

21. Antigen
Any substance foreign to
the body that evokes an
immune response either
alone or after forming a
complex with a larger
molecule (as a protein)
and that is capable of
binding with a product (as
an atibody or T cell) of
the immune response.
phagocytosis: 1 antibodies, 2 antigen, 3 macrophage, 4 antibody-coated antigen, 5 receptors for antibody, 6 phagocytic vacuole

22. Sites for Lymph Nodes
Name Location Drains fluid from:
Axillary
Cervical
Inguinal
Mediastinal

23. Sites for Lymph Nodes
Name Location Drains fluid from:
Axillary Armpits Arms
Cervical Neck Head and neck
Inguinal Groin Legs and pelvis
Mediastinal Chest Within chest cavity

24. Location of lymph vessels, lymphatic ducts, and areas of lymph node
concentrations.

25. Tonsils
 Collections of lymphatic tissue located on
each side of throat
 There are three sets of tonsils
 Palatine tonsils
 Pharyngeal tonsils (adenoids)
 Lingual tonsils

26. Tonsils
 All contain a large number of
leukocytes
 Act as filters
 Prevent invasion of pathogens
through digestive or respiratory
systems
 Not required for life and can safely
be removed if they become a
continuous site of infection

28. Spleen
 Located in LUQ of
abdomen
 Consists of lymphatic
tissue that is highly
infiltrated with blood
vessels
 Vessels spread out into
slow moving blood
sinuses

29. Spleen
 Phagocytic macrophages line blood sinuses
to remove pathogens (WBC)
 Because blood is moving through slowly,
macrophages have time to identify
pathogens and worn out RBCs
 Filters out and destroys old red blood cells,
recycling the iron
 Not an essential organ for life and may be
removed due to injury or disease

30. Thymus Gland
 Located in upper portion of
mediastinum
 Secretes hormone, thymosin
 Changes lymphocytes to
T lymphocytes
(simply called T cells a
speicalized type of WBC)
 Active in unborn child and
throughout childhood until
adolescence, when it begins to
shrink in size

31. Thymus Gland
 Essential for proper
development of immune
system
 Assists body with immune
function and development of
antibodies
 Important role in the immune
response

32. Lymphatic System Exercise
Click here to review the lymphatic system in a labeling activity.
Back to Directory

33. Immunity
 Body’s ability to defend itself against
pathogens
 Bacteria, viruses, fungi, protozoans, toxins,
cancerous tumors
 Two forms
 Naturalimmunity
 Acquired immunity

34. Natural Immunity
 Also called innate immunity
 Not specific to a particular disease
 Doesn’t require prior exposure to pathogen
 Example:
 Macrophage
 WBCs that ingest any pathogen encountered

35. Figure 6.14 – Enhanced photomicrograph showing a macrophage (purple) attacking bacillus Escherichia coli
(yellow).

36. Acquired Immunity
 Body’s response to a specific pathogen
 May be either:
 Passive acquired immunity
 Active acquired immunity

37. Acquired Immunity
 Passive acquired immunity
 Results when a person receives protective
substances produced by another human or animal
 Examples: maternal antibodies, antitoxin
 Active acquired immunity
 Develops following direct exposure to pathogen
 Stimulates immune response – series of mechanisms
designed to neutralize pathogen
 Immunizations or vaccinations are special
types of active acquired immunity

38. Immune Response
 Disease-causing agents called antigens stimulate
immune response
 Two distinct and different processes
 Humoral immunity
(also called antibody-mediated immunity)
Production of B cells
 Cellular immunity
(also called cell-mediated immunity)
Production of T cells and NK cells

39. Humoral Immunity (Immune response)
 Involves production of B lymphocytes
 Also called B cells
 Respond to antigens by producing a
protective protein, an antibody
 Antibodies combine with antigen to form …..
antigen-antibody complex
 Targets pathogen for phagocytosis
 Prevents infectious agent from damaging
healthy cells

40. Cellular Immunity (Immune response)
 Involves production of T cells and …..
natural killer cells (NK)
 These defense cells are …..
cytotoxic
 Physically attack and destroy pathogenic cells

41. Standard Precautions
 There are a large number of pathogens in a hospital
setting
 Nosocomial infection
Acquired in the hospital
 Cross infection
Pathogen acquired from another person
 Reinfection
Becomes infected again with same pathogen
 Self-inoculation
Pathogen from one part of patient’s body spreads
to another part of body

42. Summary of
Standard Precaution Guidelines
i Wash hands before putting on and after
removing gloves and before and after working
with patient or equipment.
e Wear gloves when in contact with any body fluid,
mucous membrane, or non-intact skin or if you
have chapped hands, a rash, or open sores.
d Wear non-permeable gown or apron during
procedures that are likely to expose you to any
body fluid, mucous membrane, or non-intact skin.

43. Summary of
Standard Precaution Guidelines
i Wear mask and protective eyewear or a face
shield when patients are coughing or if body fluid
droplets or splashes are likely.
e Wear face mask and eyewear that seal close to
the face during procedures that cause body
tissues to be vaporized.
B Remove for proper cleaning any shared
equipment that has come into contact with body
fluids, mucous membrane, or non-intact skin.

44. Word Building with
adenoid/o & immun/o
–ectomy adenoidectomy
–itis adenoiditis
–logist immunologist

45. Word Building with
adenoid/o & immun/o
surgical removal of
–ectomy adenoidectomy
adenoids
–itis adenoiditis inflammation of adenoids
–logist immunologist immunity specialist

46. Word Building with
lymph/o
aden/o
lymphadenectomy
–ectomy
aden/o
lymphadenopathy
–pathy
angi/o
lymphangiogram
–gram
angi/o –oma lymphangioma
–oma lymphoma
–tic lymphatic

47. Word Building with
lymph/o
aden/o surgical removal of
lymphadenectomy
–ectomy lymph gland
aden/o
lymphadenopathy lymph gland disease
–pathy
angi/o
lymphangiogram record of lymph vessel
–gram
angi/o –oma lymphangioma lymph vessel tumor
–oma lymphoma lymphatic tumor
–tic lymphatic pertaining to lymph

48. Word Building with path/o & splen/o
–genic pathogenic
–logy pathology
–ectomy splenectomy
–megaly splenomegaly

49. Word Building with path/o & splen/o
–genic pathogenic disease producing
–logy pathology study of disease
–ectomy splenectomy surgical removal of spleen
–megaly splenomegaly enlarged spleen

51. Word Building with thym/o
–ectomy thymectomy
–oma thymoma

52. Word Building with thym/o
–ectomy thymectomy surgical removal of thymus
–oma thymoma thymus tumor

53. Word Building with tonsill/o
–ar tonsillar
–ectomy tonsillectomy
–itis tonsillitis

54. Word Building with tonsill/o
–ar tonsillar pertaining to tonsils
–ectomy tonsillectomy surgical removal of tonsils
–itis tonsillitis inflammation of tonsils

55. Lymphatic & Immune Vocabulary
(13)
allergen antigen causing an allergic reaction
physician who specializes in testing for and
allergist
treating allergies
allergy hypersensitivity to a common substance
disease resulting from immune system
autoimmune attacking its own body as is if a pathogen;
disease examples include rheumatoid arthritis and
systemic lupus erythematosus

56. Lymphatic & Immune
Vocabulary
appearance of wheals as part of
hives
allergic reaction
human
virus that causes AIDS; known
immunodeficiency virus
as a retrovirus
(HIV)
immune system that does not
immunocompromised function properly; also called
immunodeficiency disorder
antibodies; assist in protecting
immunoglobins
the body

57. Color enhanced scanning electron micrograph of HIV virus (red) infecting T-helper cells (green).
(NIBSC/Science Photo Library/Photo Researchers, Inc.)

58. Lymphatic & Immune
Vocabulary
branch of medicine concerned with
immunology
treating immune system disorders
tissues’ response to injury; redness, pain,
inflammation
swelling, and feeling hot to touch
excessive tissue fluid due to blocked
lymphedema
lymphatic flow
opportunistic infection appearing in
infection immunocompromised person
urticaria severe itching associated with hives

59. Figure 6.16 – Inflammation as illustrated by cellulitis of the arm. Note
that the area is red and swollen. It is also painful and hot to touch.

60. Inflammation Video
Click here to view a video on the topic of inflammation.

61. Allergic Reactions

62. Allergic Reactions
life-threatening condition from severe
anaphylactic allergic reaction; circulatory and
shock respiratory problems occur; also called
anaphylaxis

63. Anaphylaxis Animation
Click here to view an animation on anaphylaxis.

64. Lymphatic System Pathology (6)
inflammation and obstruction of lymph
elephantiasis vessels; results in enlarged tissues due to
edema
Hodgkin’s cancer of the lymphatic cells found in
disease (HD) concentration in lymph nodes
inflammation of lymph nodes; commonly
lymphadenitis
called swollen glands

65. Late-stage Hodgkin’s disease with tumor eroding skin above
cancerous lymph node.

66. Lymphatic System Pathology
mononucleosis acute viral infection with large
(mono) number of atypical lymphocytes

67. Lymphatic System Pathology
mononucleosis acute viral infection with large
(mono) number of atypical lymphocytes
non-Hodgkin’s
cancer of the lymphatic tissues other
lymphoma
than Hodgkin’s lymphoma
(NHL)

68. Immune System Pathology (7)
acquired defect in cell-mediated immunity;
immunodeficiency result of final stages of HIV
syndrome (AIDS) infection
early stage of AIDS; mild
AIDS-related
symptoms; weight loss, fatigue,
complex (ARC)
anorexia
complication of bone marrow
graft vs. host transplant; immune cells from
disease (GVHD) donor marrow attack recipient’s
body

69. AIDS Video
Click here to view a video on AIDS and HIV.

70. Immune System Pathology
Kaposi’s sarcoma skin cancer seen in AIDS patients;
(KS) brownish-purple skin lesions
Pneumocystis
common in AIDS patients; an
carinii pneumonia
opportunistic infection
(PCP)
autoimmune disease; forms fibrous
sarcoidosis
lesions in multiple organs of body
severe combined
genetic disorder; born without a
immunodeficiency
functioning immune system
syndrome (SCIDS)

71. Clinical Laboratory Tests
enzyme-linked blood test for an antibody to AIDS
immunosorbent virus; positive test means person has
assay (ELISA) been exposed to virus
Western blot used as a backup to ELISA test for HIV

72. Diagnostic Imaging
lymphangiography X-ray taken after injection of dye

73. Additional Diagnostic
Procedures
Monospot test for mononucleosis
allergy testing in which body is exposed to
scratch test
allergens through light scratch in skin

74. B
A
Scratch test; patient is exposed to allergens through light scratch in the skin.
B) Positive scratch test results.
Inflammation indicates person is allergic to that substance.
(James King-Holmes/Science Photo Library/Photo Researchers, Inc.)

75. Medical Procedures
patient receives immunoglobulin
immunotherapy
injection or antibodies to treat a disease
vaccination exposure to weakened pathogen to
stimulate immune response; person
will then be able to fight off pathogen if
exposed to it in the future; also called
immunization

76. Surgical Procedures
surgical removal of a lymph node;
lymphadenectomy done to test for malignancy or
metastasis

77. Lymphatic and Immune
Pharmacology
blocks histamine release Zyrtec,
antihistamine
during allergic reaction Benadryl
anti-inflammatory; used
prednisone,
corticosteroids to treat autoimmune
Solu-Medrol
diseases
blocks immune system;
immuno- CellCept,
prevents rejection of
suppressants Neoral
transplant

78. Lymphatic and Immune
Pharmacology
inhibits protease, enzyme
protease Crixivan,
needed for viruses to
inhibitor drugs Fortovase
reproduce
inhibits reverse
reverse
transcriptase, enzyme Epivir,
transcriptase
needed for viruses to Retrovir
inhibitor drugs
reproduce

79. Lymphatic and Immune
Abbreviations
AIDS acquired immunodeficiency syndrome
ARC AIDS-related complex
ELISA enzyme-linked immunosorbent assay
GVHD graft vs. host disease
HD Hodgkin’s disease
HIV human immunodeficiency virus

80. Lymphatic & Immune
Abbreviations
Ig immunoglobulin
KS Kaposi’s sarcoma
mono mononucleosis
NHL non-Hodgkin’s lymphoma
NK natural killer cells
PCP Pneumocystis carinii pneumonia
SCIDS severe combined immunodeficiency syndrome