Lymph Node

Lymph Node

Capsule, Cortex, Medulla and Trabeculae of Lymph node

Medullary Cords and Medullary Sinus of Lymph Node

Lymph Follicle and Germinal Center of Lymph Node

Palatine Tonsil

Germinal Center, Tonsillar Crypt, and Lymphoid Noduled of Palatine Tonsil

Lumen and Nodule of Appendix

Germinal Center of Appendix

Overview of the Spleen

Red Pulp, White Pulp and central Artery of the spleen

Splenic Cords and Splenic Sinusoids

Spleen

Thymus

Reticular Cells and Thymic (Hassels's) Corpuscle of the Thymus

Thymus

Peyer's Patches of the Ileum

Structure of a Lymph Node (p. 756 in text book)

Figure 20.1 (p. 752 in text book)

Figure 20.2 Lymphatic System (p. 753 in text book)

Figure 20.2b (p. 753 in text book)

What promotes closure to the mini-valves associated with lymph capillaries?

Increasing pressure inside lymph capillary

___ are primary lymphoid organs.

Bone Marrow and Thymus

What areas are in a secondary lymphoid allow intimate contact between blood and the lymphocytes?

White Pulp of the Spleen

Where in the lymph node do the T- Cells first encounter antigens presented by dendritic cells?

Deep in the cortex

Collections of lymphoid tissues, called MALT (mucosa associated lymphoid tissue), are strategically placed throughout the respiratory, digestive and genitourinary system. Which one of these is located at the end of the Small Intestine?

Peyer's Patches

There is a decrease in our ability to fight infection as we age. Which lymphoid organ may have a role in this decline?

Thymus

Which of the following is NOT a pat of the lymphatic system?

A) lymphatic vessels

B) blood vessels

C) lymph nodes

D) lymph

B) blood vessels

Peyer's Patches are located ___.

wall of the small intestine

Small organs associated with lymphatic vessels are termed ___.

Lymph Nodes

The thymus is the only lymphoid organ that does not __.

directly fight antigens

T/F: Lymph Capillary permeability is due to mini-valves and protein filaments.

TRUE

Where are the lingual tonsils located?

Base of the tongue

T/F: When tissues are inflammed, lymphatic capillaries develop openings that permit uptake of large particles such as cell debris, pathogens and cancer cells.

TRUE

Which lymphatic structure drains lymph from the right side upper limb, right side of the head and right side of the thorax?

Right Lymphatic Duct

What structure delivers lymph into the junction of the internal Jugular vein and subclavian vein?

Thoracic Duct

Which lymphoid cells secrete antibodies?

Plasma Cells

Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a ___.

Tonsil

The thymus is most active during ___.

Childhood

T/F: Lymph arrives to the lymph nodes via efferent lymphatic vessels.

FALSE

What do collecting lymphatic vessels NOT share in common with veins of the cardiovascular system?

Thickness of the walls

The ___ are the most likely to become infected.

Palatine Tonsils

Once collected, lymph is returned to ___.

venous circulation

Which lymphoid organ provides a site for lymphocyte proliferation and immune surveillance and response and provides blood-cleansing functions?

Spleen

Antibodies that act against a particular foreign substance are released by __.

Plasma Cells

___ is not a normal component of lymph.

Red blood cells

Where are worn-out erythrocytes found in the spleen?

Red Pulp

Lymphatic vessels ____.

return tissue fluid to the bloodstream

The first lymphoid organ to appear during fetal development is the ___.

Thymus

Which lymphoid organ serves as the site where T-Lymphocytes become immunocompetent T-Cells?

Thymus Gland

___ tissue is predominantly reticular connective tissue.

Lymphoid

___ is NOT a lymphatic cell.

Eosinophil

Which is not a function of lymph nodes?

produce lymph fluid and cerebrospinal fluid

Lymph nodes are surrounded by a capsule from which connective tissue strands extend inward to divide the node into compartments. What is the name of these strands?

Trabeculae

Which tonsil is located in the posterior wall of the nasopharynx and is referred to as the adenoids if it is enlarged?

Pharyngeal Tonsil

Of the following lymphoid organs, which are structurally simplest and lack a complete capsule?

Tonsils

Lymph from what regions of the body are drained into the right lymphatic duct?

Right upper limb, right side of the head and thorax

___ is not a lymphoid organ or tissue.

Bone Marrow

Antibodies are produced by ___.

Plasma cells

Which of the following statements about the thymus is NOT true?

It has follicles similar to those of the spleen

What is the name of the enlarged sac to which the lumbar trunks and the intestinal trunk returns lymph?

Cisterna Chyli

Which of the following would not be classified as a lymphatic structure?

A) Tonsils

B) Spleen

C) Pancreas

D) Peyer's Patches

C) Pancreas

Which part of the spleen is the site of immune function?

White Pulp

What is the role of the mini-valves in lymph capillaries?

Increases permeability

Which of the following is NOT a part of MALT?

a) Tonsils

b) Lymph Nodes

c) Peyer's Patches

d) Appendix

b) Lymph Nodes

The lymphatic capillaries are ___.

more permeable than blood capillaries

Peyer's patches are found in the ___.

Ileum of the small intestine

Lymphatic collecting vessels are most closely associated with ___.

Capillary beds

Which of the following is not a part of the lymphatic system?

a) Erythrocytes

b) Lymph Nodes

c) Lymph

d) Lymphatic Vessels

a) Erythrocytes

Lymph capillaries are are absent in all except ___.

a) CNS

b) Digestive Organs

c) Bones and Teeth

d) Bone Marrow

b) digestive organs

Large clusters of lymph nodes occur in all of the following locations except ___.

lower extremities

___ returns lymph to the right lymphatic duct.

Right Jugular Trunk

T/F: The Cisterna Chyli collects lymph from the lumbar trunks, draining the upper limbs and from the intestinal trunk draining the digestive organs.

FALSE

Functions of the spleen include all of the following except ___.

a) storage of blood platelets

b) storage of iron

c) forming crypts that trap bacteria

d) removal of old or defective blood cells from the blood

c) forming crypts that trap bacteria

Lymph transport involves all but which of the following?

a) milking action of active muscle fibers

b) lymph capillary mini-valve action

c) thorax pressure changes during breathing

d) smooth muscle contraction in the lymph capillary walls

d) smooth muscle contraction in the lymph capillary walls

Which lymphoid organ serves in immune surveillance and in filtering lymph?

Lymph Nodes

Which of the following is a role of lymph nodes?

a) they produce lymph

b) the return lymph to circulation

c) they filter lymph

d) they produce red blood cells

c) they filter lymph

___ is NOT a function of the lymphatic system.

Transporting respiratory gases

___ lacks lymph capillaries.

Bones and teeth

___ are functions of lymphoid tissue.

Furnish an ideal surveillance vantage point for lymphocytes and macrophages

House and provide a proliferation site for lymphocytes

___ does not contain MALT tissue.

Thymus

Digestive tract associated lymphatic tissue includes all of the following except ___.

Islets of Langerhans

Which lymphoid organ is primarily active during the early years of life?

Thymus