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Anatomy and Physiology of the Lymphatic System
The structures and functions of the lymphatic system
28
Anatomy
Undergraduate 2
11/09/2014

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Term
Lymph Vessels
Definition
complex network of thin-walled vessels in close proximity to the capillary network
Term
Lymph Vessels
Definition
a one-way system with valves to control the direction of lymphatic fluid
Term
Lymph
Definition
fluid that courses through the lymph vessels
Term
Lymph
Definition
cells of immunity are suspended in this
Term
Lymph Nodes
Definition
tiny ovoid structures or encapsulated nodules located along lymph vessels; packed with lymphocytes to engulf pathogens
Term
Lymph Nodes
Definition
are abundant in all entrances to the trunk- ingiunal, axillary and neck regions; become sore and swollen when fighting infections
Term
Lymph Nodes
Definition
cleanse the lymph fluid of all toxins and foreign substances
Term
Afferent Vessels
Definition
bring lymph fluid into the lymph node
Term
Efferent Vessels
Definition
exits filtered lymph out of the lymph node
Term
Lymphatic Organs
Definition
red bone marrow, thymus gland and spleen
Term
Red Bone Marrow
Definition
produces both red and white blood cells; lymphocytes in particular play a pivotal role in immunity
Term
Red Bone Marrow
Definition
found in the skull, sternum, ribs, clavicle, pelvic girdle and vertebral column
Term
Thymus Gland
Definition
filled with T-lymphocytes that have migrated from the bone marrow and reside here until maturity
Term
Thymus Gland
Definition
located in the thoracic cavity between the trachea and sternum; most active before age 25
Term
Spleen
Definition
located in LUQ of the abdominal cavity behind the stomach; thin outer capsule is susceptible to bursting if infected or hit hard
Term
Spleen
Definition
made mostly of red pulp that filters the blood and white pulp that cleanses the blood using lymphocytes
Term
Edema
Definition
localized swelling caused by the accumulation of tissue fluid gone uncollected by the lymphatic system
Term
Edema
Definition
occurs if too much tissue fluid is made by the body and/or not enough is drained away
Term
Lymphatic System
Definition
removal or drainage of excess tissue fluids that are returned to the cardiovascular system
Term
Lymphatic System
Definition
transportation and absorption of fats by lacteals; immunity against disease by WBC's (especially lymphocytes)
Term
Lacteals
Definition
found in the small intestine; transport and absorb fats from the small intestine to the bloodstream
Term
Metastasis
Definition
the spread of cancer far from its place of origin
Term
Innate Immunity
Definition
external barriers- skin; internal barriers- mucous membranes, inflammation, fever, phagocytosis, complement and killer cells and antimicrobial proteins
Term
Innate Immunity
Definition
the body's way of handling defenses in a general way; the 1st and 2nd lines of defense
Term
Adaptive Immunity
Definition
involves production of specific types of cells- T-cells, B-cells and plasma cells
Term
Adaptive Immunity
Definition
involves production of specific antibodies to destroy a particular antigens- immunoglobulins, IgG, IgA, IgM, IgD and IgE
Term
Meningitis
Definition
inflammation of the meninges; can test for by passively flexing patients neck while lying supine with legs straight
Term
Meningitis
Definition
flu-like symptoms, highly contagious and found commonly in teenagers; triad of symptoms- fever, headache and stiff neck
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