vocab
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| lymphatic system | the lymphatic vessels, and the lymphoid tissues and organs including lymph nodes.
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| edema | an abnormal accumulation of fluid in body parts or tissues; causes swelling.
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| lymphatic vessels | form an elaborate drainage system that picks up this excess tissue fluid and returns it to the blood.
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| lymph | the watery fluid in the lymph vessels collected from the tissue spaces
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| lymphatics | form a one-way system, and lymph flows only toward the heart.
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| lymph capillaries | weave between the tissue cells and blood capillaries in the loose connective tissues of the body, and absorb the leaked fluid
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| lymphatic collecting vessels | lymph is transported from the lymph capillaries through successively larger lymphatic vessels
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| right lymphatic duct | drains the lymph from the right arm and the right side of the head and thorax
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| thoracic duct | receives lymph from the rest of the body
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| lymph nodes | a mass of lymphatic tissue
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| macrophages | cell particularly abundant in lymphatic and connective tissues; important in the immune response as an antigen presenter to T cells and B cells.
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| lymphocytes | agranular white blood cells formed in the bone marrow that mature in the lymphoid tissue
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| cortex | the outer surface layer of an organ
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| follicles | collection of lymphocytes in a lymph node
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| germinal centers | dark-staining centers
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| medulla | the central portion of certain organs
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| afferent lymphatic vessels | lymph enters the convex side of a lymph node through this.
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| sinuses | a dilated channel for passage of blood or lymph
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| hilum | a depressed area where vessels enter and leave an organ
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| efferent lymphatic vessels | lymph exits from the node at its indented region, via this.
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| lymphoid organs | organs in the lymphatic system including lymph nodes, spleen and tonsils
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| spleen | a soft, blood-rich organ that filters blood.
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| thymus | an endocrine gland active in the immune response
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| tonsils | small masses of lymphoid tissue that ring the pharynx, where they are found in the mucosa.
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| tonsillitis | tonsils that become congested with bacteria and become red, swollen, and sore.
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| Peyer's patches | resemble tonsils, are found in the wall of the distal part of the small intestine.
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| appendix | a wormlike extension of the large intestine.
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| mucosa-associated lymphoid tissue | Peyer's patches, the appendix, and the tonsils are part of the collection of small lymphoid tissue
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