The digestive tract is the tube that extends from the mouth to the anus, and it consists of the (1) mouth, (2) pharynx, (3) esophagus, (4) stomach, (5) small intestine, and (6) large intestine. The accessory organs include the (1) teeth, (2) tongue, (3) salivary glands, (4) liver, (5) gallbladder, and (6) pancreas.ccessory organs The accessory organs include the â (1) teeth, â (2) tongue, â (3) salivary glands, â (4) liver, â (5) gallbladder, and â (6) pancreas. Figure 26.1Illustration showing the design and structures of the digestive system.
Nutrients such as omega-3 fatty acids, lutein, zinc, and vitamins C and E might help ward off age-related vision problems such as macular degeneration and cataracts, studies show. Regularly eating these foods can help lead to good eye health 1  : Green, leafy vegetables such as spinach, kale, and collards. 2  Salmon, tuna, and other oily fish. 3  Eggs, nuts, beans, and other non-meat protein sources. 4  Oranges and other citrus fruits or juices.
All are similar in protein, fiber, and fat [content].. Still, she says, some nuts are higher in certain nutrients than others. For instance, almonds are the best source of vitamin E, she says. Cashews are a good source of magnesium, and pistachios are rich in the phytonutrients important to eye health, she says.