Lymphatic System

Types of fluids

• Blood→travels in blood vessels

• Tissue fluid→fluid that left blood to go to tissues

• Lymph→fluid that travels in lymph vessels

Explain the role of the lymphatic system

• Transports antigen presenting cells as part of the lymph to secondary lymphoid tissue for antigen recognition.

• Filters pathogens.

• Serves as the location of clonal selection and expansion, initiating the adaptive immune response.

Lymph Vessels

• Have dead ends

• Unidirectional: have valves that prevent fluid from going backwards

Primary Lymphoid Organs

• Primary→where B and T cells develop:

  • Thymus→Where T cells develop

  • Bone marrow→Where B cells develop

Secondary Lymphoid Organs

• Secondary→Filters lymph:

  • Lymph nodes (if asked name this)

  • Spleen

Name 2 Primary Lymphoid Tissues

• Thymus

• Bone Marrow

Name 2 Secondary lymphoid tissues

• Lymph nodes

• spleen