Lymphatics & Lymphatic Organs
Appendix
A mass of lymphatic tissue at the beginning of the large intestine that helps trap destroy ingested pathogens.
Peyer's patches
Aggregations of lymph nodules found within the mucosal lining of the small intestine
Lymphatic nodules
Include Peyer's patches, tonsils, appendix, and MALT
Primary lymphatic organs
Include red bone marrow and thymus
Secondary lymphatic organs
Include spleen, lymph nodes, and lymphatic nodules
Spleen
Largest lymphatic organ that is composed of white and red pulp
Spleen
Lymphatic organ found in the left abdominal region that filters blood
Thymus
Lymphatic organ packed with lymphocytes where T cells mature
Thymus
Lymphatic organ that is also an endocrine organ that secretes thymosins enabling T cell maturation
Spleen
Lymphatic organ that serves as reservoir for blood
Thymus
Lymphatic organ that shrinks/atrophies after puberty
Red bone marrow
Lymphatic organ where lymphocytes are created and where B cells mature
Lymph nodes
Lymphatic structures packed with lymphocytes and macrophages that tend to occur in clusters
Tonsils
Masses of lymphoid tissue with high concentration of lymphocytes that protect against pathogens that enter through nasal and oral cavities
Lymphatic nodules
Masses of not fully encapsulated lymphatic tissue that serve to protect the body from pathogens in the respiratory and digestive tract
Lymphatic capillaries
Small, blunt-ended structures that picks up lymph at tissues throughout the body
Lymph node
Small, oval shaped lymphatic organ enclosed by a capsule that filters lymph
Lymphatic capilaries
What is A and E?
Tonsils
What is A?
Cisterna chyli
What is B?
Pulmonary capilaries
What is B?
Cervical lymph nodes
What is C?
Spleen
What is C?
Systemic artery
What is C?
Axillary lymph nodes
What is D?
Inguinal lymph nodes
What is E?
Lymph node
What is F?
Valve
What is G?
Lymphatic vessel
What is H?
Lymphatic duct
What is I?
Lymphatic vessels
What is h?
Thymus
What organ is B?
Peyer's patches
What organ is D?
Lymphatic capillaries
collects fluid that leaks from blood capillaries into tissue fluid
Thoracic duct
collects lymph from the left side of the head and neck, the upper left quadrant of the trunk, the left arm, and the entire lower portion of the trunk and both legs; empties into the left subclavian vein
Right lymphatic duct
collects lymph from the right side of the head and neck, the upper right quadrant of the body, and the right arm; empties into the right subclavian vein
Lymphatic trunks
formed by the merging of the lymphatic vessels that carry lymph to lymphatic ducts
Lymphatic ducts
largest of the lymphatics that carry lymph back into venous circulation
Secondary lymphatic organs
sites where immune response occurs
Primary lymphatic organs
the sites where lymphocytes are produced and/or become immunocompetent
Lymphatic vessels
vessels, similar to veins, but thinner and with more valves that carry lymph through lymph nodes into lymphatic trunks
