Lymphatic ststem

Bean shaped structures long lymphatic vessels. Detect pathogens in lymph and initiate immune response. Proliferation of T cells and production of antibodies cause them to swell after they detect pathogen

Clear, watery, isotonic fluid. Resembles blood plasma but with a lower protein content

Vessels with large pores that enable large molecules (ex. Proteins) pathogens, and excess interstitial fluid to cross its walls. Return excess fluid and large molecules to blood

Defend against pathogens that enter through nose and mouth. Have deep fissures where pathogens accumulate and cause inflammation. Lymphocytes and macrophages initiate immune response

Vein that receives lymphatic fluid

Paired tonsils between oral cavity and pharynx.

Tonsils located under the tongue

Tonsil between nasal cavity and pharynx near opening of auditory tube

Site of hematopoiesis and B cell maturation

Macrophages remove pathogens as blood passes through this organ.

Site of T cell maturation

That open when interstitial fluid builds up

Contraction of skeletal muscles cause movement of lymph>> vessels values ensures one way flows

Pathway of Lymph Flow