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Lymphatic System/Immunity
Lecture Notes
19
Anatomy
Undergraduate 3
10/24/2010

Additional Anatomy Flashcards

 


 

Cards

Term
Name 3 main functions of the Lymphatic
Definition

1. Fluid Recovery

2. Immunity-Immune cells in nodes

3. Lipid Absorption- Lacteals(small Intest)

Term
Components of the Lymphatic system
Definition

lymph: recovered fluid

 

lymphatic vessels:transport lymph

 

Lymphatic Tissue: aggragates of lymphocytes and macrophages

 

Lymphatic Organs

Term
Lymph
Definition

is usually a clear, colorless fluid, similar to blood plasma but low in protein.

 

Originates as tissue fluid(thats been taken up by lymphatic vessels)

Term
Lymphatic Vessels
Definition

Similar to blood vessels, lymph flows through this system.

 

Lymphatic Capillaries (terminal lymphatics)-->Collecting Vessels-->Lymphatic trunks(6)-->Collecting Ducts(2 collecting vessels)-->Subclavian veins

Term
Lymphatic Capillaries
Definition

Microscopic.

Penetrate nearly every tissue of the body but are absent from the central nervous system, cartilage, cornea, bone, and bone marrow. (Unlike blood cap. they are closed at one end.)

Term
Name the 6 major lymphatic trunks
Definition
jugular, subclavian, bronchomediastinal, intercostal, intestinal, and lumbar
Term
Collecting Ducts
Definition
The largest of the lymphatic vessels
Term
Name the 2 collecting ducts
Definition

Right lymphatic duct

 

Thoracic duct

Term

Right Lymphatic duct:

 

location?

 

Where does it empty?

Definition

Formed by convergence of the right  jugular, subclavian, and bronchomediastinal.

 

Empties into the right subclavian vein.

Term

Location of theThoracic Duct:

 

Definition
On the left side, begins just below the diaphragm-anterior to the vertebral column @ level of second lumbar vertebrae
Term
Cisterna Chyli
Definition
Where the 2 lumbar trunks and intestinal trunk join. Prominent sac. Large amount of Chyle(fatty intestinal lymph)
Term
Thoracic (respiratory) Pump
Definition
promotes the flow of lymph from the abdominal to the thoracic cavity as one inhales, similar to that of the venous return.
Term

Natural Killer Cells

NK

Definition

Large lymphocytes. Attack and destroy bacteria, transplanted tissue cells, and host cells that have either become infected with viruses or turned cancerous.

 

Immune Surveillance

Term
T Lymphocytes
Definition

T cells:

Lymphocytes that mature in the thymus and later depend upon thymic hormones.

Thymus-dependant

Term
B Lymphocytes
Definition

B Cells:

Lymphocytes that differentiate into plasma cells- conn. tissue cells that secrete the antibodies of the immune system.

 

B for Bone Marrow-Site of maturation

Term
Macrophages
Definition
Very large.Develope from Monocytes and Phagocytize and Destroy tissue debris.
Term

Antigen-Presenting Cells

APCs

Definition
Process foreign matter and display antigenic fragments of it to certain T cells, alerting the immune system of the presence of an enemy.
Term
Dendritic Cells
Definition

Branched, mobile APCs found in the epidermis, mucous membranes, and lymphatic organs.

 

Play an important role in alerting the immune system of pathogens that have breached the body surfaces. Engulf foreign matter by receptor-mediated endocytosis rather than phagocytosis.

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