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Lymphatic System: Unit Review and Quiz
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Unit Review
Here is what we have learned from this unit:
- The lymphatic system returns excess interstitial fluid
to the blood, absorbs fats and fat-soluble vitamins, and
provides defense against disease.
- Lymph is the fluid in the lymphatic vessels. It is picked
up from the interstitial fluid and returned to the blood
plasma.
- Lymphatic vessels carry fluid away from the tissues.
- The right lymphatic duct drains lymph from the upper right
quadrant of the body and the thoracic duct drains all the
rest.
- Pressure gradients that move fluid through the lymphatic
vessels come from the skeletal muscle action, respiratory
movements, and contraction of smooth muscle in vessel walls.
- Lymph enters a lymph node through afferent vessels, filters
through the sinuses, and leaves through efferent vessels.
- Tonsils are clusters of lymphatic tissue associated with
openings into the pharynx and provide protection against
pathogens that may enter through the nose and mouth.
- The spleen is a lymph organ that filters blood and also
acts as a reservoir for blood.
- The thymus is large in the infant and atrophies after
puberty.
Quiz
To test how much you have learned from this unit, two types
of quizzes have been created. The first type is a multiple-choice
quiz. The quiz questions are grouped into several sets of
two questions each to reduce the size of the content on each
page. When you finish the questions in one set, click the
Next button (a right-pointing arrow icon located in the Title
Bar) to proceed to the next page.
The second type is a drag-and-drop quiz, in which, by using
the mouse pointer, you drag a textual or graphic element to
a target area to show your knowledge of the material covered
in the unit. Note that the object you are dragging will snap
back to its original position until it is placed in the correct
target area. Try to drag the object as close to the center
of the target area as possible so that the object will snap
to the target area when you chose a correct answer.
Please click here to
take the multiple-choice quiz.
Please click here to
take the drag-and-drop quiz.
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