When Xi stepped up to the podium at Davos in January and delivered a robust defense of free trade to the globe's financial elite, the Western world was stunned. â ben westcott, CNN, Why China won 2017 and how Donald Trump helped them do it, 3 Nov. 2017
Confidence votes 120. Capillaries are very small blood vessels that are small enough to exchange gases, nutrients, waste products, etc. with tissues.
The circulatory system transports nutrients and blood cells to and from cells throughout the body. Blood is oxygenated in the lungs then sent back to the heart to be pumped to the rest of the body in blood vessels. The types of blood vessels include veins, arteries and capillaries. Veins carry blood to the heart while arteries carry blood away from the heart. Oxygen diffuses into the cells directly from the capillaries.