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10 Cards in this Set
- Front
- Back
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Describe the major functions of the lymphatic system
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1. Maintaining fluid balance 2. Filtration 3. Protection 4. Absorption of fats |
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Identify major parts of the lymphatic system
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Where are lymphocytes produced?
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In the Red bone marrow
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Describe how lymph is formed
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Exchange of fluid between capillaries and body tissues results in excess fluids remaining in the tissue (known as Interstitial fluid) Lymph is formed from these excess fluids
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Describe the function of lymph nodes |
as lymph is transported to the heart, it is filtered through lymph nodes, (dotted along lymphatic vessels).
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Most common shape of lymph nodes |
kidney shaped, 2cm long
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Where are lymph nodes found?
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close to the surface of the body, in the groin, armpit and the neck.
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What happens in the filtering structure of a lymph node?
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Lymph flows through the open space (medullary sinus) where foreign substances are trapped by mesh like reticular fibres. This triggers macrophages and lymphocytes into defence action. |
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Spleen
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largest lymphoid organ, size of a fist with rich blood supply. Located left side of the abdominal cavity beneath the diaphragm, curving around the stomach |
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Thymus
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found overlying the heart in thoracic cavity. During childhood organ is large and most active. with growth it shrinks. Thymus produces hormones that enable T cells to become fully functional (known as IMMUNOCOMPETENT)
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