Hi im bob and the answer is 4cm3455465x32 this is due to the high blood pressure
Capillaries carry Oxygenated (oxygen rich) blood and De-oxygenated (oxygen depleted) blood.
capillaries
The alveoli and capillaries in the lungs pass oxygen to the blood. Both have very thin walls, which allow the oxygen to pass from the alveoli to the blood. The capillaries then connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.
Arterioles carry blood from larger arteries to capillaries. This blood is high in oxygen. Capillaries bring blood to cells which need oxygen for energy production.
Arteries, capillaries, and veins carry oxygen in the blood.
Capillaries in your lungs provide oxygen to the haemoglobin molecules of red blood cells.
Capillaries - they are the smallest vessels that serve as arteries and veins.
Technically, blood is always oxygenated to some degree. The capillaries are where the blood exchanges oxygen with the tissues so the blood entering the capillaries has more oxygen than the blood leaving the capillaries but under resting conditions venous blood is still 75% oxygenated.
capillaries
Oxygen and other gases pass through the capillaries.
Capillaries are the smallest blood vessels in your body and act as the exchange point for oxygen.
Once oxygenated blood reaches the capillaries, the velocity of the blood is very slow - which favours the exchange of oxygen. Oxygen therefore diffuses across the walls of the capillaries into the tissues that need it.