Chapter 22: The Lymphatic System & Immunity
Compared to blood capillaries, lymph capillaries exhibit all of the following except that they
are smaller in diameter.
The medulla of a lymph node contains ________ lymphocytes and macrophages.
B
________ are clusters of lymphatic nodules deep to the epithelial lining of the small intestine.
Peyer's patches
________ are large lymphatic nodules that are located in the walls of the pharynx.
Tonsils
**The term lymphadenopathy refers to
a chronic or excessive enlargement of lymph nodes.
All of the following are true of the thymus gland except that it
activates B Cells
Lymphatic capillaries are known for all of the following except
allowing nutrient gas exchange
The primary function of the lymphatic system is
defending the body against both external and internal threats
Which class of cells is particularly abundant in the red pulp of the spleen?
macrophages
**Lymph nodes do all of the following except
remove excess nutrients from the lymph
T Lymphocytes are produced and stored in all of the following except
the brain
The lymphatic system is composed of all of the following except
the venae cavae
Lymphatic organs differ from lymphatic tissues in what way?
they are surrounded by a fibrous capsule and lymphatic tissues are not.
Most of the lymph returns to the venous circulation by way of the
thoracic duct
The lymphatic system does all of the following except
transports gases to and away from lymph nodes.
Areas of the spleen that contain large aggregations of lymphocytes are known as
white pulp