Lymphatic and Immune System

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Lymph Noun

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[limf]

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Lymph

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The fluid inside lymphatic vessels, composed of water, plasma, fats, and white blood cells like lymphocytes.

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Example: This diagram shows the lymphatic system, including the lymph vessels and lymph nodes, which are the structures that contain and transport lymph fluid throughout the body.

Front

Lymphocytes Noun

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[lim-fo-sights]

Back

Lymphocytes

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The main cellular components of lymph; a type of white blood cell involved in the adaptive immune response.

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Example: This image shows real lymphocytes, a type of white blood cell, stained purple and surrounded by pink red blood cells as seen under a microscope.

Front

Lymph Nodes Noun

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[limf noads]

Back

Lymph Nodes

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Tiny, oval-shaped structures that filter foreign particles from the lymph and initiate adaptive immune responses.

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Example: This diagram shows the location of lymph nodes, which are small structures in the immune system, forming a network in areas like the neck.

Front

Spleen Noun

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[spleen]

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Spleen

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The largest lymphatic organ, which filters blood, recycles red blood cells, and houses lymphocytes to initiate immune responses.

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Example: This cross-section of the spleen shows its internal anatomy, including the red pulp that filters blood and the white pulp that stores immune cells.

Front

Thymus Noun

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[thy-mus]

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Thymus

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A primary lymphoid organ located in the chest where T-cells mature and are stimulated for production.

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Example: This diagram shows the location of the thymus gland in the chest and a magnified cross-section revealing its main parts: the capsule, cortex, and medulla.

Front

Tonsils Noun

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[ton-sils]

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Tonsils

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Lymphatic tissue in the back of the throat that filters pathogens and initiates adaptive immune responses.

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Example: This diagram shows the location of the main tonsils (pharyngeal, palatine, and lingual) in the throat, which are part of the immune system.

Front

Interstitial Fluid Noun

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[in-ter-stish-ul floo-id]

Back

Interstitial Fluid

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Fluid in the spaces between cells that bathes and nourishes them, becoming lymph once it enters lymphatic vessels.

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Example: This diagram shows interstitial fluid as the watery substance that surrounds body cells, located between the cells and the blood vessels.

Front

Chyle Noun

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[kyle]

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Chyle

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A milky, fatty-acid-enriched fluid formed from the absorption of lipids in the small intestine's lymphatic vessels.

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Example: This diagram shows a lymphatic capillary (lacteal), the vessel that absorbs chyle. Its overlapping cells form one-way flaps allowing the fatty lymph to enter.

Front

Lacteals Noun

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[lak-tee-uls]

Back

Lacteals

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Specialized lymphatic vessels in the small intestine's lining that absorb fatty acids, which then form chyle.

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Example: This diagram shows a lacteal, a lymphatic vessel inside a villus of the small intestine, which absorbs digested fats from food.

Front

Leucocytes Noun

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[loo-ko-sights]

Back

Leucocytes

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The general term for all white blood cells, which are the primary cells responsible for fighting diseases.

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Example: This image displays the five main types of leucocytes (white blood cells), including neutrophils, eosinophils, basophils, lymphocytes, and monocytes, which are key immune cells.