Anatomy Ch. 21 Lymphatic System
Which of these statements regarding lymph capillaries is false?
They have precapillary sphincters that regulate drainage of lymph from tissues.
Lymphatic vessels perform all of the following functions except
carrying blood.
The thymus is most active during
childhood.
Which cell has the responsibility of presenting foreign antigens to lymphocytes?
dendritic cell
Lymph leaves a lymph node via
efferent lymphatic vessels.
Clusters of lymph nodes occur in all of the following sites except
in bones and bone marrow.
The tonsil located on the posterior surface of the tongue is the ________ tonsil.
lingual
Which of the following is not a part of MALT?
lymphocytes in the spleen
Masses of lymphoid tissue within a lymph node.
lymphoid follicles
Which lymphatic structure drains lymph from the right upper limb?
right subclavian duct
Recycles red blood cells and initiates immune responses.
spleen
The largest lymphoid organ.
spleen
Which of the following lymphoid structures have a hilum?
spleen and lymph nodes
In humans, T lymphocytes originate in
the red bone marrow.
Which of the following lymphoid organs does not directly fight antigens?
the thymus
Duct of the lymphatic system that drains the body's entire lower half.
thoracic duct
Blockage of the ________ duct would prevent drainage only from the ________ and lumbar trunks.
thoracic; intestinal
