Lymphatic System Quiz Flashcards

Specialized lymph capillaries
Terms Definitions
chemical barriers
enzymes (pepsin,lysozyme)
can fix complement
target specific invaders

___________ LARGEST Lymphoid Organ
1. immunity-production and distribution of lymphocytes. Primary lymphoid tissue- red bone marrow. Secondary-lymph node, tonsils, spleen2. movement of fluid. maintenance of normal blood volume. mantenance of interstitial fluid homostasis3. transportation of digested fat (chylomicrons) from the small intestine. Provide an alternative rout for the transport of hormones, nutrients, and waste product.
second Line of defense
leukocytes/phagocytesantimicrobal proteinsinflammatory response


Nodes give rise to lymphocytes
Phagocytize foreign substances and help activate T cells
Are lymphatic organs well defined?
Disease of the lymph glands(nodes)
Collecting ducts location
thoraxic ductright lymphatic duct
family of many identical cells descending from one cell

4. Antimicrobial Substances

a. Interferon

b. Complement
c. Properdin
White Pulp
distributed throughout spleen in tiny islands and composed of packed lymphocytes and macrophages around a central artery
White pulp
-masses of lymphocytes(WBC's) in spleen
-site of immune response by lymphocytes
________ helps to activate T cells
- identify lymphoid nodules => defensive mechanism, filter out foreign cells & bacteria to protect you against infection
Specialized lymph capillaries in the small intestines that transport chyle through the lymphatic system to the circulatory system (by way of the thoracic duct)
Specialized lymph capillaries in the villi of the small intestines
diffuse lymphatic tissue
scattered reticular tissue elements comprise this 'package' type
specialized lymphatic nodules found in the distal half of the small intestine
nonspecific immunity
attacks any irritant or abnormal substance; gives general protection
Lymph Nodes
Outer region - T-Cells
Inner germinal center Proliferating B-Cells

Function -filter antigens from lymph
Initiate immune responses


If antigen has only one determinant site
Lymph Fluid
- Appearance- Clear fluid, less protein than plasma
- Function- delivers the nutrients, oxygen, and hormones required by the cells
The lymphoid organ that does not directly fight antigens is the?
infection of appendix that can be dangerous if the appendix ruptures because the infection fills the abdominal cavity
- cannot produce immune response OR can produce but can't maintain => leads to infection- problem with immune system cells/components- can occur at any time within the lifespan1) genetic, primary => born with (SCID - severe combined immunodeficiency syndrome), child has no immune function2) acquired, secondary => after birth; malnourishment, AIDS
what are the patches of lymphatic tissue at the pharynx entrance called?
our own protein molecules which our immune cells do not attack
Relating to the space between tissues usually occupied by fluid
1. largest lymphoid organ2. located in the abdominal LUQ3. Anterior to the ribs 9-114. not normally palpable- clin correlate: splenomegaly5. immune fuctions- white pulp functions- activation of lymphocytes by antigens. phagocytosis of antigens by macrophages6. blood maintenance-removal of damages and worn out RBCs, WBCs, and platelets. Storage of platelets. Hemopoiesis, under circumstances
antibody mediated immunity
involve antibody production, is effective against pathogens and foreign cells
The lumbar trunk collects lymph in ______
lower extremities.
antibodies and complement
two protein molecules critical to immune functioning
Lymph vessels return....
Lymph a misxture of interstitial fluid, solutes and sometimes forign material to the blood stream

What cells are responsible for CELL MEDIATED IMMUNITY

T cells
-When proteins and water remain in the extracellular space
-removal of the axillary lymph nodes disrupts lymphatic drainage of the limb
Lymphedema is?
Swelling of tissue from swolen lymph vessels
The triangular shaped gland below the sternum in the superior mediastinum
The Thymus
complement activiation causes
"membrane attach complexes; release of vasodilators, chemotaxis; causes opsonization"
Describe lymphatic flow
blood capillaries - ->tissue --> Lymphatic capillaries -->lymph vessels -->lymph ducts --> subclavian vein
filter potentially harmful particles from the lymph

immune surveillance sends macrophages and lymphocytes to make sure that the body is being protected
What is a lacteal?
Specialized lymph capillaries in the villi of intestines: help to absorb digested fats from intestine.
 Lymphatic Vessels
All over body, can contact almost any cell
More like veins - have valves
Closed on 1 end
More porous that capillaries - pores larger, get the junk and cells through
Which cells of the lymph node perform a surveillance role?
T Cells
nonspecific defense functions of complement
- enhances inflammation- opsonization => process that enhances phagocytosis; coating microbes in complement- cytolysis
immune system protection
- antibodies and killer T cells- immune system can make own response => active immunity- immune system that you acquire from someone/something else => passive immunity
What type immunited do T cell provide?
Cell Mediated immunity
A type of White Blood Cell that helps fight infection
function of Peyer's patches
capture and destroy bacteria in intestine
a disease in which the blood does not clot noramlly
What are Class II MHC proteins?
Found only on immune cells?
How are lymphatic vessels different than veins?
 have more valves
walls are thinner
 contain lymph nodes
Function of lymph vessels (lymphatics).
Collect lymph from lymph capillaries and deliver it to either the thoracic duct or right lymphatic ducts.
nonspecific defense mechanisms
- protects you against a wide variety of pathogens at the same time- innate immunity => in place ALL the time; born with- response to pathogen is always the same (time to occur & intensity)- often referred to as your first line of defense
Red pulp define
Regions of the spleen taht house the chords of cells, reticular, plasma, macrophage and blood sinus
What makes up the Lymphatic System?
1) Lymph
2) Lymphatic vessels
3) Lymphatic Tissues (including lymph nodes)
4) Red Bone Marrow (key in WBC production)
antimicrobial chemicals - 2
"complement (group of at least 20 plasma proteins), interferon (secreted proteins of virus-infected cells"
lymphoid nodules (sometimes form PART of a lymph nodes)
solid, spherical bodies that are packaged tightly together; made of reticular elements and lymphatic cells
What is a lymphatic follicle?
Solid spherical bodies that lack a capsule, have tightly packed reticular elements and cells.
What drains form the upper side of the body and empties into right subclavian vein?
Right Lymphatic Duct
How are lymphatic capillaries diff. than capillaries found in the circulatory system?
More permiable, minivalves, blind end tube.
cell-mediated immunity (Step 4)
- helper T cells function by secreting cytokines which produce interferon, interleukin (division of helper T cells), secrete chemicals that make B cells divide and are chemotaxic (call on macrophages)- helper T cells help intensify both arms of the immune system therefore intensifying attacks on foreign antigens
Name two characteristics of lymph fluid.
Clear, colorless, less protein than plasma
Where to lymphatic vessels drain into?
Internal Jugular Veins & Subclavian Veins
ONLY LYMPHATIC ORGANS have a connective tissue capsule surrounding them. T/F?
TRUE. lymphatic TISSUES do NOT
What are some types of antigens that are found?
Foreign proteins, nucleic acids, certain lipds, and large sugars.
 where are the lymphatic ducts?
What regions of the body to they drain?
Right Lympatic duct - drains upper R. quadrant
Thoracic - L quadrant - entire lower body
Cisterna Chyli - from small intestine
The spleen is a reservoir of what?
Red blood cells, iron and platelets
What is the most important function of C1 of the complement system?
Activating C3 to become C3b
What are the 3 functions of the lymphatic system?
1. Protection from foreign invaders2. Picks up lost blood fluid3. Picks up fat soluble materials before they go in blood
Give some examples of locations of where lymph tissue not organized into organs could be located.
1. Peyer's patches in the intestine2. In mucous membranes (lamina propria)3. Stroma (supporting tissue of an organ)of almost every organ.
Innate Immunity - 1st line of defense
Name examples of defense agents on the skin and in mucous membranes.
1) Skin - Salts, antimicrobial agents (Oil), Ph, Keratin
2) Mucous membranes contain mucous to trap particles
Note - The epidermis is constantly sloughing off or shedding
What are the 5 organs of the lymphatic system?
1. Nodules2. Tonsils3. Lymph nodes4. Thymus5. Spleen
The SPLEEN is ____ to the diaphragm and _____ to the stomach.
a: inferior\r\nb: posterior and lateral (posterolateral)
Name the two main functions of the lymphatic system.
1) To filter excess fluid and return it to the blood
2) Defend against pathogens and disease causing organisms
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