Chapter Questions - Lymphatic System

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1

What is lymph? Where does it come from?

What is lymph? Where does it come from?

Lymph is the fluid inside the lymphatic vessels, and enters lymphatic vessels as interstitial fluid. ISF is a filtrate of blood plasma

2

Name two lymphatic ducts and indicate the body regions usually drained by each.

Name two lymphatic ducts and indicate the body regions usually drained by each.

The right lymphatic duct receives lymph from the right upper limb and the right side of the head and thorax.

The thoracic duct drains lymph from the rest of the body

3

What is the driving force for lymph movement?

What is the driving force for lymph movement?

Lymph movement is driven by the contraction of adjacent skeletal muscles, pressure changes in the thorax during breathing, and the pulsations of nearby arteries.

4

What is a lymphoid follicle? What type of lymphocyte predominates in follicles, especially in germinal centers?

What is a lymphoid follicle? What type of lymphocyte predominates in follicles, especially in germinal centers?

Lymphoid follicles are solid, spherical bodies consisting of tightly packed reticular elements with cells. They are regions where B cells predominate.

5

What is the benefit of having fewer efferent than afferent lymphatics in lymph nodes?

What is the benefit of having fewer efferent than afferent lymphatics in lymph nodes?

Having fewer efferent lymphatics causes lymph to accumulate in lymph nodes, allowing more time for it to be cleansed.

6

What is MALT? List several components of MALT.

What is MALT? List several components of MALT.

Mucosa-Associated Lymphatic Tissue (MALT) - protects passages that are open to the exterior from the never-ending onslaughts of foreign matter entering them. The appendix, and the tonsils—all located in the digestive tract—and lymphoid follicles in the walls of the bronchi (organs of the respiratory tract) and in the mucosa of genitourinary organs

7

List several functions of the spleen

List several functions of the spleen

The spleen cleanses the blood, stores breakdown products of RBCs, stores platelets, and is thought to be a site of erythrocyte production in the fetus

8

Which lymphoid organ develops first?

Which lymphoid organ develops first?

The thymus develops first