Some travel-related infections are spread through the bites of insects, such as mosquitoes (which carry malaria, mah-LAIR-e-uh, and yellow fever) or flies (for example, the tsetse, SET-see, fly can carry trypanosomiasis, trih-pan-o-so-MY-uh-sis). bite from an infected mosquito can transmit filariasis (fih-luh-RYE-uh-sis), a parasitic disease that affects the lymphatic system * . When the infected mosquito feeds, tiny worms pass from it to the person, where they travel to and grow in the lymph vessels.
The role of the liver in digestion. The liver is the largest solid organ inside the body and plays a very important role in the process of digestion by physically regulating it and ensuring release of post digestive nutrients into the system.
Liver, gallbladder and pancreas. The liver, pancreas and gall bladder are called accessory organs. This means they work with the GI tract to break down food. Liver. The liver is the largest gland in the body, weighing about 1.5 kg (3.3 lb) in an adult. The liver has many roles in the digestive system. For example, it: 1  produces a green fluid called bile, which breaks down fats. 2  removes wastes and toxins from the body.  breaks down nutrients and stores some vitamins and minerals.