Flashcards in Anatomy and Physiology of the Immune System Deck (20)
In the nervous system, macrophages are called _______.
"Mononuclear cells" refers to ______ and _____, because their nuclei are simpler than granulocytes.
Eosinophils fight _______.
Describe the anatomy of a lymph node.
The outermost layer is cortex, then deep cortex (or paracortex), and finally medulla. There are afferent and efferent lymphatics and blood vessels.
Where in the lymph node are antibodies made?
T cells reside in the _____.
Paracortex / deep cortex
Lymph nodes in the wall of the intestine are called ______.
The "buffy coat" in centrifuged blood is _______.
Polymorphonuclear cells are _______.
cells whose nuclei are lobular (i.e., granulocytes)
List the leukocytes in order of most to least populous.
Neutrophils > lymphocytes > monocytes > eosinophils > basophils (although young children have more lymphocytes than neutrophils)
Of lymphocytes, what percent are T and B?
70% T, 20% B, 10% other
Central lymphoid organs are organs in which _______.
Peripheral lymphoid organs include ________.
Peyer patches, lymph nodes, the spleen, lymph vessels, tonsils, adenoids
Lymph enters in the _________ and exits through ______.
subscapular sinus; efferent lymphatics (at the hilum)
Which is denser, the cortex or the paracortex?
Postcapillary venule cells are ________.
high and cuboidal
When a lymphocyte extravasates at a lymph node, it drains into ________.
lymph ducts that take it to the next lymph node and then finally the venous circulation (via the cisterna chylii)
Red pulp (in the spleen) corresponds to _____.
the medulla of the lymph nodes (where filtration takes place)
Peyer patches drain into _______.
the mesenteric lymph nodes