-
Microorganisms that cause disease or damage to the tissues of the body
Pathogens
-
Important for the protection of the body; Involved with fighting infections, as well as filtering blood and lymph to remove pathogens
Lymphatic System
-
Functions of the Lymphatic System
- 1. Maintenance of Fluid Balance
- 2. Lipid Absorption
- 3. Defense
-
The interstitial fluid that enters the lymphatic capillaries
Lymph
-
The Lymphatic vessels used by the lymphatic system to absorb lipids and other substances from the digestive tract
Lacteals
-
Pathogens are filtered from lymph through the ____
Lymph nodes
-
Pathogens are filtered from the blood by the ____
Spleen
-
Components of the Lymphatic System
- 1. Lymph
- 2. Lymphatic vessels
- 3. Lymph nodes
- 4. Tonsils
- 5. Spleen
- 6. Thymus
- (7. Lymphocytes)
-
Are tiny, close-ended vessels consisting of simple squamous epithelium
Lymphatic capillaries
-
Overlapping _____ of the lymphatic capillary walls act as _____ that prevent the back-flow of fluid
squamous cells, valves
-
Resemble small veins; Have a beaded appearance because they have one-way valves
Lymphatic vessels
-
The right lymphatic duct empties into the ____
Right subclavian vein
-
The thoracic duct empties into the ____
Left subclavian vein
-
Lymphatic organs:
- 1. Lymph nodes
- 2. Tonsils
- 3. Spleen
- 4. Thymus
-
Respond to pathogens by dividing and increasing in number within the lymphatic tissue
Lymphocytes
-
3 groups of tonsils
- 1. Palatine tonsils
- 2. Pharyngeal tonsils
- 3. Lingual tonsils
-
Tonsils that are located on each side of the posterior opening of the oral cavity
Palatine tonsils
-
Tonsil located near the internal opening of the nasal cavity; called adenoids when enlarged
Pharyngeal tonsil
-
Tonsils located on the posterior surface of the tongue
Lingual tonsils
-
Form a protective ring of lymphatic tissue around the openings between the nasal and oral cavities and the pharynx
Tonsils
-
Removal of the pharyngeal tonsil
Tonsillectomy
-
Removal of the palatine tonsil
Adenoidectomy
-
Rounded structures that vary in size; Located near lymphatic vessels
Lymph nodes
-
Superficial aggregations of lymph nodes on each side of the body:
- 1. Inguinal nodes (groin)
- 2. Axillary nodes (axilla/armpit)
- 3. Cervical nodes (neck)
-
Roughly the size of a clenched fist; Located in the left, superior corner of the abdominal cavity
Spleen
-
Detect and respond to foreign substances in the blood and destroy old and damaged red blood cells
Spleen
-
Lymphatic tissue surrounding the arteries within the spleen
White pulp
-
Lymphatic tissue containing macrophages and red blood cells, and enlarged capillaries that connect to the veins
Red pulp
-
Removal of the Spleen
Splenectomy
-
Is a bilobed gland located in the superior mediastinum behind the sternum that produces and matures lymphocytes
Thymus
-
Lymph with high lipid content
Chyle
-
Pre-T cells are produced in _____
Red bone marrow
-
Pre-T cells migrate to the ____, where they mature to become T cells
Thymus
-
Cells that are produced and mature in the red bone marrow
B cells
|
|
