Cardiovascular System: Lymphatic and Immune System

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Human Anatomy
Chapter 23
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1

The tonsils located just behind the openings of the pharyngotympanic tubes in the pharynx are
the ________ tonsils.

tubal

2

The ________ is the site of T cell maturation.

thymus

3

________ flows in one direction, toward the heart.

lymph

4

The lumbar and intestinal trunks unite at the ________ of the thoracic duct.

cisterna chyli

5

________ are lymphatic structures that collect fat-laden fluids from the intestinal tract.

lacteals

6

The ________ prevents premature activation of immature thymic lymphocytes.

blood-thymus barrier

7

The paired ________ drain lymph from the head and neck.

jugular trunks

8

The ________ duct drains three-quarters of the body.

thoracic

9

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

activation

10

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

white pulp

11

Aggregated lymphoid nodules and the ________ contain dense concentrations of lymphoid
tissue and are associated with the distal structures of the digestive tract.

appendix