Cardiovascular System: Lymphatic and Immune System
The tonsils located just behind the openings of the pharyngotympanic
tubes in the pharynx are
the ________ tonsils.
The ________ is the site of T cell maturation.
________ flows in one direction, toward the heart.
The lumbar and intestinal trunks unite at the ________ of the thoracic duct.
________ are lymphatic structures that collect fat-laden fluids from the intestinal tract.
The ________ prevents premature activation of immature thymic lymphocytes.
The paired ________ drain lymph from the head and neck.
The ________ duct drains three-quarters of the body.
Lymphocyte ________ results in immune cells that have gained the
ability to attack specific
Lymphoid tissues that enclose the central arteries of the spleen are
Aggregated lymphoid nodules and the ________ contain dense
concentrations of lymphoid
tissue and are associated with the distal structures of the digestive tract.