Lymphatic duct

When invading microorganisms have crossed the epithelial barriers they will almost certainly be taken up, with lymph, in the lymphatic ducts and be delivered to the filtration and immrme systems of the local lymph nodes. Sometimes this serves to spread infections... 

Right lymphatic duct opens into right subclavian vein of bloodstream... 

Macrophages marginate out of dermal capillaries and lymphatic ducts to the active site of infection. 

Host macrophages containing germinated I bacilli migrate back into blood capillaries and lymphatic ducts drainirrg to local and regional lymph nodes. ... 

FIGURE 31.3. Spore uptake in cutaneous anthrax disease. The steps involving spore uptake at the primary site of local infection on the skin, germination inside the macrophage, and migration back into lymphatic ducts are illustrated. Illustrations are copyright protected and printed with permission by Alexandre M. Katos. 

Vegetative bacilli are transported via lymphatic ducts to regional mesenteric lymph nodes. 

Jugular trunk Right lymphatic duct Subclavian trunk... 

When invading microorganisms have crossed the epithelial barriers they will almost certainly be taken up with lymph in the lymphatic ducts and be delivered to filtration and immune systems at the local lymph nodes. Sometimes this serves to spread infections further around the body. Eventually, spread may occur from local to regional lymph nodes and thence to the bloodstream. Direct entry to the bloodstream from the primary portal of entry is rare and will only occur when the organism damages the blood vessels or if it is injected directly into... 

Turning to the cellular anatomy of the CSF, the normal cell count is up to 4 pi This is constituted of approximately two-thirds lymphocytes and one-third macrophages. This comprises an ideal mixture for the production of antibodies. Since the brain has very few lymphatic ducts, it has been argued that one of the main functions of CSF is to act as a kind of lymph for the brain tissue. Under pathological conditions this function becomes especially prominent. 

The small intestine, which comprises the duodenum, the jejunum and the ileum, is the main absorption site and contains a series of finger-like projections, the vilh, which greatly increase the surface area available for absorption of nutrients. Each villus contains an arteriole and venule, together with a drainage tube of the lymphatic system, a lacteal. The venules ultimately drain into the hepatic portal system, and the lacteals into the thoracic lymphatic duct. The luminal side of each villus is covered with projections, the microvilli, which are often referred to as the brush border. 

Figure 6. Diagr

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