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There are interlocking networks of capillaries on the surface of the stomach and intestines to absorb digested nutrients from food and transport those nutrients throughout the body. The uterus has capillary networks for the reverse reason - to supply nutrients to a growing fetus.
The small intestine further breaks-down partly digested food using its enzymes and enzymes from the pancreas. It then absorbs the nutrients from these foods and passes the nutrients on to the blood capillaries.
Arteries to arterioles to capillaries where exchange occurs. Oxygen and nutrients are exchanged for carbon dioxide and wastes.
All blood vessels allow gases, such as oxygen and nitrogen, as well as liquids, enzymes, etc, to pass through them. Food particles, once absorbed by the small intestines, become part of this process.
Capillary.capillariesCapillaries.Blood flow moves from arteries, to arterioles, to capillaries, to venules, to veins, to the heart, and then back to arteries. Capillaries are where the exchange of oxygen and other materials happens.Capillaries
the capillaries diffuse the digested food to every cell in the body
capillaries
If you do not get enough nutrients for the day, you will lose energy. You will be likely to consume more food than if you maintain proper nutrient levels.
Nutrients from food and beverage is absorbed inside the walls of the small intestine. As we digest our food, all nutrients are taken in the small intestine and would most probably then enter our bloodstream from there on.
Much of the nutrients are absorbed by the small intestine, where the surface area is minimized by the villi, which absorbs the "soup" of food that has been digested by the duodenum, the stomach, and the mouth. The soup is absorbed by diffusion and reaches either the lacteal or capillaries. Lacteal carries fat, and blood vessels carries everything else such as glucose.The absorbed nutrients can now be used by the body.
Capillaries exchange food, oxygen, and carbon dioxide.
Pure diffusion ... everything flows from high concentration toward low. No energy is expended in these exchanges.