The Structure of a Lymph Node Flashcards

Efferent Vessel

• Transports lymph away from the lymph node.
• Essential for the drainage of lymphatic fluid.

Medulla

• Innermost part of the lymph node.
• Contains medullary cords and sinuses, playing a crucial role in lymph processing.

Cortex

• The outer region of the lymph node, rich in B cells.
• Involved in the activation and proliferation of immune cells.

Deep Cortex (T Cells)

• Area within the cortex where T cells are primarily located.
• Associated with the immune response and surveillance.

Medullary Cord

• Strands of lymphoid tissue in the medulla.
• Contains plasma cells that produce antibodies.

Afferent Vessel

• Brings lymph fluid into the lymph node.
• Multiple afferent vessels ensure adequate filtration and immune response.

Lymph Node Artery & Vein

• Supply blood to the lymph node.
• Vital for providing nutrients and oxygen, enabling proper lymph node function.

Subcapsular Space

• Area just beneath the capsule of the lymph node.
• Contains macrophages and dendritic cells that play key roles in immune response initiation.

Medullary Sinus

• Spaces within the medulla that receive lymph from the medullary cords.
• Facilitates the exit of lymph back into circulation via efferent vessels.

Outer Cortex (B Cells)

• Region of the lymph node where B cells are concentrated.
• Site of antibody production and maturation in response to pathogens.

Capsule

• Dense connective tissue layer surrounding the lymph node.
• Provides structural support and protection to the internal components.