Lymphoid system Flashcards

1
Q

What is lymphoid system

A

An organ system that is a component of ADAPTIVE IMMUNE SYSTEM

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2
Q

Function of lymphatic system

A

immune surveillance
antigen-specific immune response
immunological memory

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3
Q

Categories of lymphoid organs

A

Primary
Secondary

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4
Q

Primary lymphoid organs

A

Form and mature lymphocytes

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5
Q

Examples of primary lymphoid organs

A

Bone marrow and Thymus

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6
Q

Secondary lymphoid organs

A

Contain mature lymphocytes and initiate adaptive immune response

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7
Q

Examples of secondary lymphoid organs

A

Spleen
Lymph nodes
Mucosa-associated lymphoid tissue

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8
Q

Bone marrow

A

B cells and Natural Killer Cells formation and maturation
T cells development

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9
Q

Thymus

A

T cells maturation

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10
Q

Why is thymus most active during childhood

A

In adults, it may be difficult to differentiate from adipose

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11
Q

Two parts of spleen

A

Red pulp: red blood cells- removes waste from the blood get rid of damaged blood cells

White pulp: white blood cells- make antibodies

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12
Q

Where are lymph nodes mainly grouped

A

neck
axillae
groins
lung
hila
mesentry

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13
Q

What do lymph nodes do

A

Bring together antigens and lymphocytes

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14
Q

Lymph nodes

A

Cervical nodes
Deep
axillary
femoral
inguinal
tracheal
pericranial ring

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15
Q

Functional components of lymph nodes

A

Stromal (lymphocytes)
Lymphatic (look out for antigens)
Vascular(delivers lymphocytes to lymph nodes)

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16
Q

Structure of a lymph node

A

Cortex
Medulla
Hilum (site of entry of an artery and exit of a vein)

17
Q

Important sites of mucosa-associated lymphoid tissue (MALT)

A

GALT
BALT
Oropharynx (Waldeyer’s ring)