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Cardiovascular I > Reticuloendothelial system > Flashcards

Reticuloendothelial system Flashcards

1
Q

What are the lymphoid organs?

A

Thymus
Lymph nodes
Spleen
Tonsils

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2
Q

What are the general classifications of cells in the lymphoid system?

A

Lymphocytes
Macrophages
Dendritic cells
Reticular cells

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3
Q

What lymphoid cell is associated with cellular immunity?

A

T lymphocyte

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4
Q

What lymphoid cell is associated with humoral immunity?

A

B lymphocyte

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5
Q

What are the primary lymphoid organs?

A

Bone marrow - B lymphocytes
Thymus - T lymphocytes

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6
Q

What are the general functions of primary lymphoid organs?

A

Maturation
Differentiation

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7
Q

What are the secondary lymphoid organs?

A

Lymph nodes
Spleen
Tonsils

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8
Q

What is the general function of secondary lymphoid organs?

A

Interaction with antigens - filtration

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9
Q

What are the histological features of the thymus?

A

Many lobules
Cortex
Medulla (thymic corpuscles)

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10
Q

What is a Hassall corpuscle?

A

Small eosin stained, partly keratinized structure
Degenerated epithelial cells

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11
Q

Where are some clusters of lymph nodes?

A

Inguinal
Cervical
Axillary

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12
Q

What are the functions of the lymph nodes?

A

Filters lymph
Helps with activation of the immune system

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13
Q

What allows lymphocytes and macrophages to work in the lymph nodes?

A

More vessels entering then leaving causes lymph to stagnate slightly in the node

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14
Q

What are the histological features of the lymph nodes?

A

Capsule with trabeculae
Cortex
Medulla

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15
Q

What are histological features of the spleen?

A

Capsule of dense CT
Trabeculae penetrate parenchyma
White pulp
Red pulp

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16
Q

What is splenic white pulp?

A

Thick accumulation of lymphocytes surrounding central A - periarterial lymphatic sheath

17
Q

What is splenic red pulp?

A

Large number of RBCs being filtered
Consists of splenic sinuses separated by splenic cards

18
Q

What do splenic cords in the red pulp contain?

A

RBCs
Macrophages
Lymphocytes
Dendritic cells
Plasma cells
Granulocyte residue

19
Q

What are splenic cords in the red pulp made of?

A

Loose meshwork of reticular cells and reticular fibers

20
Q

What type of endothelium lines the splenic sinuses?

A

Rod-shaped endothelium

21
Q

What are the 4 tonsils?

A

Palatine
Lingual
Pharyngeal (adenoids)
Tubal

22
Q

What is the epithelium of the tonsils?

A

Stratified squamous nonkeratinized epithelium

Cardiovascular I (20 decks)

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