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Ch. 12 Vocab.

Vocabulary

TermDefinition
Lymphatic System the lymphatic vessels, and the lymphoid tissues and organs including lymph nodes.
Edema an abnormal accumulation of fluid in body parts or tissues.
Lymphatic Vessels to form an elaborate drainage system that picks up the excess tissue fluid.
Lymph the watery fluid in the lymph vessels collected from the tissue spaces.
Lymphatics form a one-way system, and lymph flows only toward the heart.
Lymph Capillaries weave between the tissue cells and blood capillaries in the loose connective tissues of the body.
Lymphatic Collecting Vessels lymph is transported from the lymph capillaries through successively larger lymphatic vessels.
Right Lymphatic Duct drains the lymph from the right arm and the right side of the head and thorax.
Thoracic Duct receives lymph from the rest of the body,
Lymph Nodes in particular help protect the body by removing foreign material such as bacteria and tumor cells from the lymphatic stream and by producing lymphocytes that function in the immune response.
Macrophages cell particularly abundant in lymphatic and connective tissues.
Lymphocytes strategically located in the lymph nodes and respond to foreign substances in the lymphatic stream.
Cortex the outer surface layer of an organ.
Follicles structure in an ovary consisting of a developing egg surrounded by follicle cells.
Germinal Centers enlarges when specific lymphocytes are generating daughter cells called plasma cells, which release antibodies.
Medulla the central portion of cratin organs.
Afferent Lymphatic Vessels lymph enters the convex side of a lymph node.
Sinuses a mucous membrane lined, air-filled cavity in certain cranial bones.
Hilum a depressed area where vessels enter and leave an organ.
Efferent Lymphatic Vessels are fewer efferent vessels draining the node than afferent vessels feeding it, the flow of lymph through the node is very slow, kid of like what happens when you pour something into a funnel.
Lymphoid Organs ONe of the many types of lymph nodes in the body.
Spleen a soft, blood-rich organ that filters blood.
Thymus an endocrine gland active in the immune response.
Tonsils small masses of lymphoid tissue that ring the pharynx, where they are found in the mucosa.
Tonsillitis carry out this function so efficiently that sometimes they become congested with bacteria and become red, swollen, and sore.
Payer's Patches are found in the wall of the distal part of the small intestine.
Appendix a wormlike extension of the large intestine.
Mucosa-associated Lymphoid Tissue (MALT) acts as a sentinel to protect the upper respiratory and digestive tracts from the never-ending attacks of foreign matter entering those cavities.
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