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