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the lymphatic system
Question | Answer |
---|---|
lymphatic system | Picks up tissue fluid and carries it back to the blood after filtering it. |
small lymphatic vessels (lymph capillaries) | dead ended capillaries that are responsible for collecting tissue fluid. they are made of a single layer of simple squamous epithelium and have gaps between the cells. |
large lymphatic vessels (lymphatic veins) | structure is very similar to a vein, they have thin walls and valves and the dump into ducts. they are also low pressure vessels. |
lymphatic ducts | the largest lymphatic veins |
lacteals | lymphatic capillaries found in the wall of intestines; they help to absorb fat. |
lymph nodes | located through out the body, the filter lymph, removing waste and debris, they contain macrophages which destroy garbage in the lymph |
spleen | processes old red blood cells, hemoglobin is broken down. the iron from the heme is reused and the rest is turned into wste called bilirubin. |
thymus | produces cells important for immunity |
how does lymph flow? | Lymph is a very low pressure fluid. it relies on valves, and the respiratory and skeletal muscle pumps |
how is lymph formed? | when lymphatic capillaries gather tissue fluid. The fluid gets into the capillaries because of a difference in pressure. |
If lymphatic tissue is removed from a region of the body, what will happen to that area? | The area would swell due to increased tissue fluid. (without collection of tissue fluid by lymphatic vessel the tissue fluid builds up) |
which tissue fluid is the lowest pressure fluid? | Lymph fluid is the lowest pressure fluid. |
lymphatic ducts empty into the left and right | subclavian veins |