Exam 21: The Lymphatic and Immune Systems

Lymphoid tissues that enclose the central arteries of the spleen are collectively called ________.

Which of the following is not classified as a lymphoid organ?

The tonsil located on the posterior surface of the tongue is the ________ tonsil.

________ are structures comprised of endothelial cells separated by flaplike minivalves, which open as fluid accumulates in peripheral tissue.

The thymus is most active during

How does the structure and the function of lymph-collecting vessels compare to those of veins? What tunics do they have in common?

The main function of the lymphatic system is to return excess ________ back into the blood vascular system.

Is it possible for lymphocytes to gain immunocompetence in the thymus of an 82-year-old person?

The immune system cell type that is preferentially destroyed by the AIDS virus is the

The paired lymph trunks that carry lymph from the lower limbs are the

Lymphatic vessels in the ________ collect cerebrospinal and interstitial fluid from the sub-arachnoid space.

Lymphocyte ________ results in immune cells that have gained the ability to attack specific antigens.

Two-lobed lymphoid organ located posterior to the sternum.

T cells gain immunocompetence in this lymphoid organ.

Use this illustration to answer the following questions. -Identify the letter indicating inguinal lymph nodes that filter lymph from the lower limbs.

Which lymphatic structure drains lymph from the right upper limb?

Which of the following recycle(s) red blood cells and initiates immune responses?

Begins at the cisterna chyli.

Edema is

In a histological cross section through an artery, a vein, and a lymphatic vessel, one can recognize the lymphatic vessel because it