Lymphatic System
In comparison to veins, lymphatic vessels:
have overlapping endothelial cells that allow the passage of large materials
Mucosa-associated lymphoid tissue (MALT):
is important for immune responses to ingested substances
Which of the following statements are true: -NK cells are the body's first line against viruses and some types of cancer -B cells are lymphocytes that produce antibodies -plasma cells secrete antibodies -NK cells are lymphocytes that produce antibodies -T cells mature in the thymus -T cells are lymphocytes that produce antibodies
-NK cells are the body's first line against viruses and some types of cancer -B cells are lymphocytes that produce antibodies -plasma cells secrete antibodies -T cells mature in the thymus
Lymphatic capillaries: (select that apply) -have collagen fibers to anchor them to surrounding tissue -are interlaced with blood capillaries (and arterioles and venules) of the cardiovascular system -have cuboidal endothelial cells -fill by increases in the interstitial pressure rather than a pump (e.g., the heart) -are vessels where interstitial fluid can enter the lymphatic system -are only located around vital organs
-have collagen fibers to anchor them to surrounding tissue -are interlaced with blood capillaries (and arterioles and venules) of the cardiovascular system -fill by increases in the interstitial pressure rather than a pump (e.g. heart) -are vessels where interstitial fluid can enter the lymphatic system
Which of the following statements are true: -tonsils are most active in children -tonsils are primary lymphoid organs -tonsils are collections of lymphoid nodules -swelling of the tonsils is an indication of an active immune response -tonsils are found in the small intestine
-tonsils are most active in children -tonsils are collections of lymphoid nodules -swelling of the tonsils is an indication of an active immune response
Lymph is transported through a network of increasingly larger lymphatic vessels. What is the correct order of these, from smallest diameter to largest diameter
Capillaries->vessels->trunks->ducts
The ______ collects lymph from both sides of the body inferior to the diaphragm
Thoracic duct
compared to blood capillaries, lymphatic capillaries:
are more permeable
What are the primary lymphoid organs?
bone marrow and thymus
the lymphatic system functions to maintain normal blood volume and eliminate local variations in the:
composition of interstitial fluid
The cells of the lymphatic system are collectively know as:
lymphocytes