I'm assuming you mean 'where' in the body, as opposed to 'when'. In terms of when, it happens all the time!
The exchange of nutrients from food mainly happens in the intestine, though other nutrients can be absorbed elsewhere in the body sometimes. These enter your blood stream here and travel to the relevant area of your body using the circulation. Waste will enter your blood stream as well but be filtered out of your blood by your kidneys and is passed out of the body as urine.
They are designed to exchange materials such as the alveoli exchange gases or the capillary walls exchange fluid and nutrients with the intestitial tissues.
it helps the cell exchange nutrients through the cell membrane as well as expel waste.
capillaries is where the exchange of materials occur such as; gases,nutrients, hormones, and so on.between the blood and the interstitial fluid.
Controls exchange of materials such as nutrients and waste between cells and their environment. Has other important functions for example to enable cells to receive hormones.
Fungi get their energy from waste materials and decaying organisms. They are able to use hyphae which absorb nutrients in one area. The hyphae will then grow out as a means to absorb other nutrients.
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
So they can have food oxygen and other things from the environment
Lymph vessels
The waste materials become part of the soil that provide nutrients to the growing plants.
Capillaries. Since they are only once endothelial cell thick, they can exchange gas, nutrients, and waste across their membrane. Capillaries in the brain have endothelial cells close together to onyl allow a slecetive exchange of materials, while capillaries in the kidney or liver have gaps between the endothelial cells to allow the exchange of a lot of materials.
waste and nutrients
You don't specify which organism you are asking about, but I assume you mean in humans. These processes happen all over the body between the blood capillaries and the cells. If you mean exchange with the outside world, then oxygen is exchanged in the lungs, food nutrients in the small intestine, and nitrogenous waste in the kidneys. However, waste carbon dioxide is exchanged through the lungs and other wastes through the skin.
They are designed to exchange materials such as the alveoli exchange gases or the capillary walls exchange fluid and nutrients with the intestitial tissues.
capillaries
Its all diffusion.
They are designed to exchange materials such as the alveoli exchange gases or the capillary walls exchange fluid and nutrients with the intestitial tissues.
One company's waste may be sold to another company a needed material