Dnt knw
Capillaries. they have such thin walls that substances can easily diffuse through them.
Capillary: A tiny blood vessel where substances are exchanged between the blood and the body cells.
capillaries
capillaries
There are only two substances found in between the blood cells and the capillaries. These are plasma and interstitial fluid.
Capillaries via osmosis
Capillaries take oxygen and nutrients from the blood to the cells in the body. They also remove waste products, such as carbon dioxide, from the cells.
The cells lining the brain's tiny blood vessels (capillaries) are specifically designed to prevent many substances from passing into brain tissue.
Capillaries
capillaries
Red blood cells, white blood cells, platelets, plasma, hormones, nutrients, wastes and ions.
Substances exchanged through diffusion between blood and cells.So capillaries should be near to cells.