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Quiz 8 Vocabulary Terms
Ms. Wright
6
Science
7th Grade
10/18/2007

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Term
lymphatic system
Definition
A collection of organs whose primary function is to collect extracellular fluid and return it to the blood.  Includes the lymph nodes and lymphatic vessels.
Term
lymph
Definition
The fluid that is collected by the lymphatic vessels and nodes.
Term
lymph nodes
Definition

An organ that filters lymph and that is found along the lymphatic vessels.

Term
thymus
Definition
The main gland of the lymphatic system.  It releases mature lymphocytes.
Term
spleen
Definition
The largest lymphatic organ in the body; serves as a blood reservior, disintegrates old red blood cells, and producesl lymphocytes and plasmids.
Term
tonsils
Definition
Small, rounded massess of lymphatic tissue located in the pharynx and in the passage from the mouth to the pharynx.
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