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Bio 433

Lymph nodes (Cervical, axillary, inguinal)

Large collections of lymph nodes are found in the cervical, axillary, and inguinal regions. As lymph is transported, it is filtered through lymph nodes, which cluster along the lymphatic vessels of the body. Within there are macrophages, phagocytes that destroy bacteria, cancer cels, and other foreign matter in the lymphatic stream. They filter and protect against bad things.

Lymphatic vessels

The lymphatic capillaries pick up this leaked fluid (primarily water and a small amount of dissolved proteins) and carry it through lymphatic collecting vessels to the lymphatic trunks until the lymph finally returns to the blood vascular system through one of the two large ducts. They have 3 tunics and valves

Cisterna chilli

The enlarged terminus of the thoracic duct that receives lymph from the digestive viscera

Thoracic duct

Receives lymph from the rest of the body. In humans, both the lymphatic duct and the thoracic duct empty the lymph into the venous circulation at the junction of the internal jugular vein and the subclavian vein.

Right Lymphatic Duct

Present in some but not all individuals, drains lymph from the right upper extremity, head, and thorax delivered by the jugular, subclavian, and bronchomediastinal trunks. In people without is, those trunk open directly into veins of the neck.


Curves around the left side of the stomach. Lymphoid organ that house lymphocytes and macrophages. Secondary lymphoid organ. Clonal selection occurs here.


It is located in the thorax, most active during youth. Lymphoid organ, house lymphocytes and macrophages. Primary lymphoid organ where T cells differentiate.

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